Need it URGENTLY!

Q1. Consider an instruction set has & registers namely $t0,$t1, St2, ..., St7. Some of the registers will be used to execute the following program construct. Assume that all operations take operands from the registers and no register spilling. What will be the minimum no of registers required for this execution. Justify your answer with proper use of instructions. [AM] a = 3; b = 11; c = 66; a + b; c+d; U HD Q. b + Ei d = 5 + e; return d+E