The instructions in a given program and their respective processor time ratios are as follows:

Instruction Type - Processor Time

Loading - 20%

Floating Point - 15%

Storing - 15%

Arithmetic - 30%

Branching, Jumping - 20%

If the number of instructions in the program and the clock frequency of the processor remain unchanged, then:

a) How much would speeding up the floating-point operations by 5 times accelerate the processor?

b) By how much would the arithmetic operations need to speed up to make the processor 20% faster?