PROBLEM 2 (25 PTS) "Simple Computer": 8 registers, 64-word instruction memory, 16 bits per instruction (see Notes - Unit 6) For each of the following instructions, indicate the bits for the instruction fields (if they do not apply, write 'NA), and the instruction memory contents (if some bits are unused, you can assign 0's) OPCODE DR Instruction LDI RO,3 LDI R3,2 LDI R4,6 SUB R7, RO,R4 ADI R5, R4,7 ST R5, R7 XOR R4, R7, RS LD R6, R5 BRN R7,-5 ST R7,R4 JMP R3 Address SA SB OP AD Instruction Memory contents 2 10