Hand 1) Should i've pushed the river?

Party Poker No-Limit Hold'em, $ BB (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP1 ($19.30)
MP2 ($50)
MP3 ($50.15)
CO ($45.75)
Button ($89.66)
Hero ($49.50)
BB ($49)
UTG ($50.82)
UTG+1 ($30)
UTG+2 ($16.25)

Preflop: Hero is SB with 4, 4. Hero posts a blind of $0.25.
UTG calls $0.50, UTG+1 raises to $2, 6 folds, Hero (poster) calls $1.75, 1 fold, UTG calls $1.50.

Flop: ($6.50) 8, 4, K (3 players)
Hero bets $4, UTG calls $4, UTG+1 folds.

Turn: ($14.50) 8 (2 players)
Hero bets $5, UTG calls $5.

River: ($24.50) Q (2 players)
Hero bets $10, UTG calls $10.

Final Pot: $44.50

Hand 2)

Party Poker No-Limit Hold'em, $ Hero (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG+2 ($98.63)
MP1 ($33.25)
MP2 ($27.07)
MP3 ($55.65)
CO ($50)
Button ($51.35)
SB ($70.01)
Hero ($49.75)
UTG ($45.97)
UTG+1 ($23.25)

Preflop: Hero is BB with 3, 6. CO posts a blind of $0.50. SB posts a blind of $0.25.
UTG calls $0.50, UTG+1 calls $0.50, 4 folds, CO (poster) checks, 1 fold, SB (poster) completes, Hero checks.

Flop: ($2.50) 6, 5, Q (5 players)
SB checks, Hero checks, UTG checks, UTG+1 checks, CO checks.

Turn: ($2.50) 6 (5 players)
SB checks, Hero checks, UTG bets $2.64, UTG+1 folds, CO raises to $5.28, SB folds, Hero calls $5.28, UTG folds.

River: ($15.70) 7 (2 players)
Hero checks, CO bets $8, Hero calls $8.

Final Pot: $31.70

Hand 3)

Party Poker No-Limit Hold'em, $ BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($96.13)
BB ($36.25)
UTG ($55.65)
UTG+1 ($66.37)
MP1 ($50.85)
MP2 ($69.81)
Hero ($49.50)
CO ($40.83)
Button ($20.75)

Preflop: Hero is MP3 with J, J. SB posts a blind of $0.25.
3 folds, MP2 calls $0.50, Hero raises to $3, 3 folds, BB calls $2.50, MP2 calls $2.50.

Flop: ($9.25) 7, 7, 5 (3 players)
BB checks, MP2 checks, Hero bets $4, BB calls $4, MP2 calls $4.

Turn: ($21.25) T (3 players)
BB checks, MP2 checks, Hero checks.

River: ($21.25) 8 (3 players)
BB bets $0.5, MP2 folds, Hero raises to $5, BB calls $4.50.

Final Pot: $31.25

Hand 4) This is a weird hand...Can you find a call here?

***** Hand History for Game 4184640765 *****
$50 NL Texas Hold'em - Thursday, May 04, 16:52:13 ET 2006
Table Table 96334 (Real Money)
Seat 9 is the button
Total number of players : 10
Seat 2: trashand21 ( $63.03 )
Seat 4: Endocardium ( $30.61 )
Seat 8: aston23 ( $35.43 )
Seat 10: givemetrips ( $13.30 )
Seat 6: Stripclbjnk ( $69.30 )
Seat 3: max424 ( $46.87 )
Seat 9: newjoebjose ( $16.65 )
Seat 5: kavos ( $95.26 )
Seat 7: trigimd ( $52.98 )
Seat 1: Kinguru ( $50 )
givemetrips posts small blind [$0.25].
Kinguru posts big blind [$0.50].
** Dealing down cards **
Dealt to Stripclbjnk [ Jd Js ]
trashand21 folds.
Endocardium folds.
kavos folds.
Stripclbjnk raises [$2].
trigimd folds.
>You have options at Pomeranian Table!.
aston23 calls [$2].
newjoebjose calls [$2].
givemetrips calls [$1.75].
Kinguru calls [$1.50].
** Dealing Flop ** [ 2s, 3d, 5s ]
givemetrips bets [$0.50].
Kinguru folds.
Stripclbjnk calls [$0.50].
aston23 raises [$3].
newjoebjose is all-In [$14.65]
givemetrips is all-In [$10.80]
Stripclbjnk folds.
aston23 calls [$11.65].
** Dealing Turn ** [ Qh ]
** Dealing River ** [ Kd ]
aston23 shows [ 8s, 7s ] high card king.
newjoebjose shows [ 4c, 4h ] a pair of fours.
givemetrips doesn't show [ 3c, Ac ] a pair of threes.
newjoebjose wins $6.35 from side pot #1 with a pair of fours.
newjoebjose wins $42.20 from the main pot with a pair of fours.