(FR) AKo - cbet or check/behind?

Questions below

$0.05 NL - Holdem - 8 players

BB: 190.6 BB (VPIP: 12.77, PFR: 10.64, 3Bet Preflop: 5.26, Hands: 48)
UTG: 302 BB (VPIP: 15.91, PFR: 6.82, 3Bet Preflop: 0.00, Hands: 44)
UTG+1: 41.2 BB (VPIP: 3.03, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 33)
MP: 243.8 BB (VPIP: 50.94, PFR: 37.74, 3Bet Preflop: 0.00, Hands: 54)
MP+1: 94.6 BB (VPIP: 7.69, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 13)
CO: 112.2 BB (VPIP: 30.43, PFR: 26.09, 3Bet Preflop: 25.93, Hands: 46)
Hero (BTN): 100 BB
SB: 100.4 BB (VPIP: 28.57, PFR: 28.57, 3Bet Preflop: 40.00, Hands: 8)

SB posts SB 0.4 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.4 BB) Hero has K♥ A♠

fold, fold, fold, MP+1 raises to 3 BB, fold, Hero raises to 9 BB, fold, fold, MP+1 calls 6 BB

Flop: (19.4 BB, 2 players) 7♦ 2♠ 8♦
MP+1 checks, Hero bets 9.6 BB, MP+1 raises to 26.2 BB, fold

Questions: