3. Pop Instruction (21 points). Consider the case of the pop instruction. A pop instruction reads the word pointed to by the stack pointer into the destination register and then deallocates that word from the top of the stack. (a) Provide a sequence of instructions in the MIPS ISA that implements the following pop instruction instance. Pop $vO (b) If you wanted to add the pop instruction to the MIPS ISA, what instruction format would you choose and why? (c) Why does the MIPS ISA not implement a pop instruction? Provide a technical reason. Hint: think about how you'd have to modify your datapath to support this.1 3. Pop Instruction (21 points). Consider the case of the pop instruction. A pop instruction reads the word pointed to by the stack pointer into the destination register and then deallocates that word from the top of the stack. (a) Provide a sequence of instructions in the MIPS ISA that implements the following pop instruction instance. Pop $vO (b) If you wanted to add the pop instruction to the MIPS ISA, what instruction format would you choose and why? (c) Why does the MIPS ISA not implement a pop instruction? Provide a technical reason. Hint: think about how you'd have to modify your datapath to support this.1