$15.$ The code below is the Peterson$$s algorithm from the perspective of process i$.$ Which statement indicates that process i is ready to enter its critical section?

do $\{$

flag$[$i$]=$ true; $/*$ Statement $1*/$

turn $=$ j; $/*$ Statement $2*/$

while $($flag$[$j$]$ && turn $==$ j$)$; $/*$ Statement $3*/$

critical section; $/*$ Statement $4*/$

flag$[$i$]=$ false; $/*$ Statement $5*/$

remainder section; $/*$ Statement $6*/$

$\}$ while $($true$)$; $/*$ Statement $7*/$