a) Write an assembly fragment which reads numbers from an input array. multiplies them by 4, and stores the result into another array. Assume that each entry of the array is a 32-bit number. RO contains the address of the first element of the input array, R1 contains the address of the first element of the output array, and R2 is the number of elements in the array (it may be equal to zero!). Try to use as few instructions in your loop as possible