2) A CPU runs at 4 GHz and has CPI of 1.75 for a perfect cache. It runs a program having 106 instructions, miss rate is 2.5% for 1 cache and 4% for D_cache, 25% of instructions are loads/stores. cache miss penalty is 80 clock cycles in each of I_cache/D_cache. [07 pts] . Calculate the number of memory stalls per instruction 54 What is the impact of memory stalls on the CPI? Calculate the wasted total memory stall cycles Calculate the miss penalty in seconds. dress of variable Z (in hexadecimal) will be ex able Y (in hexadecimal) will be ex Part C: Write the needed MIPS instructions to allocate a dynamic matrix MAT[5][6] of float elements and store its base address in $t8. [3 pts] D: Assume