L$1$:

mov eax, $[$esi$]$

cmp eax, $50$

jl skip ;if grade is less than $50,$ skip to the next iteration

sub eax, $50$ ;subtract $50$ from grade

mov edx, eax

add edx, $10$ ;divide by $10$ to get the number of stars to display

shr edx, $1$

mov ecx, edx ;ecx is the number of stars to display

L$2$:

output stars

loop L$2$

skip:

add esi, $4$ ;move to the next element in the array

loop L$1$