If r1 = 0xFFF16, and r2 = 4, what is the value of r3 after each of the following instructions has been executed (assume that each instruction uses the same data)?
a. MOV r3, r1, LSL r2
b. MOV r3, r1, LSR r2
c. MVN r3, r1, LSL r2
d. MVN r3, r1, LSR r2