QUESTION 19 Write a program that changes the most significant four bits those are on the left in the byte of memory at address 82 to zeros, but leaves the lower four bits at that location unchanged. Then the program halts. Assume that the byte of memory at location 82 is already assigned a value when your program starts running, that is, your program should NOT put a value there initially. Use register RO for the bit patterns at address 82. Use register R1 for the mask. Use register R2 for the result of the processing. 00: 02: 04: 06