3. When designing memory systems, it becomes useful to know the frequency of reads versus writes as well as the frequency of accesses for instructions versus data. Using the average instruction-mix information for MIPS for the program spice (as given below), find the following:

a. The percentage of all memory accesses that are for data (vs. instructions).

b. The percentage of all memory accesses that are reads (vs. writes). Assume that two-thirds of data transfers are loads.

Instruction Class	MIPS Examples	HLL Correspondence	Frequency (spice)
Arithmetic	add, sub, addi	operations in assignment statements	50%
Data transfer	lw, sw	references to data structures	41%
Conditional branch	beq, bne, slt, slti	If statements and loops	8%
Jump	j, jr, jal	procedure calls/returns, case/switch statements	1%