1.15 Assume a program requires the execution of 50106 FP instructions, 110106 INT instructions, 80106L/S instructions, and 16106 branch instructions. The CPI for each type of instruction is 1,1,4, and 2, respectively. Assume that the processor has a 2GHz clock rate. 1.15.1 [10] By how much must we improve the CPI of FP instructions if we want the program to run two times faster? 1.15.2 [10] 1.11> By how much must we improve the CPI of L/S instructions if we want the program to run two times faster? 1.15.3 [5] _$1.11> By how much is the execution time of the program improved if the CPI of INT and FP instructions is reduced by 40% and the CPI of L/S and Branch is reduced by 30%