Consider the following data:

machine M1: clock rate = 500

MHz machine M2: clock rate = 700

MHz running program-1 on M1 takes 1 sec; on M2 takes 0.8 sec

running program-2 on M1 takes 0.9 sec; on M2 takes 1.5 sec

For program-1, assume that the total number of instructions executed on M1 and M2 are 100 million and 80 million, respectively. Find the average clock cycles per instruction (CPI) for program-1 on both machines.