Consider Program A that consists of: 1000 arithmetic instructions, 500 memory instructions, and 250 branch instructions. The CPI of the instruction classes are as follows: arithmetic: 2, memory: 6, branch: 4. The clock frequency is 2 GHz. When the CPI of memory instructions is reduced to to 3, how many times faster is the improved version than the original (with 3 decimal places)? (Hint: do this in a sequence of steps: figure how long the original takes, and then how long the improved version takes, then calculate the relative improvement).