Please answer 1.13.2

1.13 Another pitfall cited in Section 1.10 is expecting to improve the overall performance of a computer by improving only one aspect of the computer. Consider a computer running a program that requires 250 s, with 70 s spent executing FHP instructions, 85 s executed L/S instructions, and 40 s spent executing branch instructions 1.13.1 [5] By how much is the total time reduced if the time for FP operations is reduced by 20%