find the average of all the numbers between 4 and 32 which are divisible by 5 .
"solution average = ( 5 + 10 + 15 + 20 + 25 + 30 ) / 6 ) = 105 / 6 = 17.5 . answer a"
divide(add(add(4, const_4), subtract(32, const_4)), const_2)