Solve (x+2< 5)∩(x-7> -6)

a.) {x|1
b.) {x|x< 3 or x> 1} (it said that this one was wrong so there's some on my behalf.)

c.) {all real numbers}

What will be the end result for the taxpayer who filed his federal income tax return using the 1040ez form shown belowa he'll owe $173b he'll receive a refund of $173c he'll owe $3921d he'll receive a refund of $3921