Answer a and c.

4-3. Assume that each location in memory between $40 and $4F contains three more than its own address (i.e. $40 contains $43, $41 contains $44, etc.). If A contains $21 and the index register contains $20, what does A contain after executing each of the following instructions? a. 8842 EORA#542 b. 9B 42 ADD A $42 c. AB 23 ADD A $23,X