I need help with the sub and sw lines.

CHALLENGE ACTIVITY 4.3.1: Conserving registers. Jump to level 1 Rewrite the instructions to reuse $t4, to conserve registers. tmpl = W + y; X = tmpl - z; Data memory 50080 x add $t4, $t0, $t1 sub $t5, $t4, $t2 sw $t5, 0$t4 ) Registers $to 2 7 $t2 11 5008 w y $t5 0