There are four classes of instructions, A, B, C, and D. The clock rate and CPI of each implementation are given in the following table.

	Clock Rate	CPI Class A	CPI Class B	CPI Class C	CPI Class D
P1	2.5 GHz	1	2	3	3
P2	3 GHz	2	2	2	2

Given a program with 106 instructions divided into classes as follows: 10% class A, 20% class B, 50% class C, and 20% class D, what CPU time is? What is the global CPI for each implementation? Find the clock cycles required in both cases.