The following short sequences of instructions are intended to take registers $t1, $t2 and $t3 as inputs, and leave a result in $t0. Not all of them are very sensible computations, but please take them as written. Match the sequences with the expression that is being calculated:

add $t1,$t1,$t1 add $t2,$t1,$t1 add $t0,$t2,$t2	Answer 1Choose...t0 = 8*t1 or t0 = 2*(t1+t2+1) or t0 = t1 + t2 -3
addi $t2, $t2, 1 add $t1, $t1, $t2 add $t0, $t1, $t1	Answer 2Choose...t0 = 8*t1 or t0 = 2*(t1+t2+1) or t0 = t1 + t2 -3
sub $t0, $t3, $t2 subi $t0, $t2, 3 add $t0, $t1, $t0	Answer 3Choose...t0 = 8*t1 or t0 = 2*(t1+t2+1) or t0 = t1 + t2 -3