$.$ text

start:

# Initialization

$1aa,0$

$1al,100$ # accumulator

$1s1,4$ # counter

$1$oop:

addi a$0,$ a$0,1$

jal ra$,$ a$\_$function

addi $s1,s1,-1$

bnez s$1,$ loop

mv $s2,$ al

# End of the program

$1a$ a$7,10$

ecall

a$\_$function:

add al$,$ al$,$ a$0$

ret

After this code executes, what will be the value stored in register a$1?$