villain is 36/10/2.6 over 88 hands

No-Limit Hold'em, $0.10 BB (5 handed)

BB ($1.80)
UTG ($6.70)
Hero (MP) ($13.55)
Button ($22.15)
SB ($10.35)

Preflop: Hero is MP with A, K
1 fold, Hero bets $0.40, Button calls $0.40, 2 folds

Flop: ($0.95) 5, 10, A (2 players)
Hero bets $0.75, Button calls $0.75

Turn: ($2.45) 4 (2 players)
Hero bets $1.60, Button calls $1.60

River: ($5.65) 9 (2 players)
Hero bets ???


Question 1: How much do we bet on the river (effective stack size on river is about 10.00)?

Question 2: If the river is a non spade what is our action?

Also, feel free to comment on the other parts of the hand as I'm sure there are things I could change.