Q$1.$ Amdahl$$s Law

Consider a serial program in two parts A and B$.$ Part A runs $10$ sec and Part B runs $15$ sec$.$ Sam

discovered that part A can be improved to run $2$ times faster, or part B can be improved to run $3$ times

faster $($but both parts cannot be improved at the same time$).$ Which part should be improved to get

better overall performance? Hint: compute the execution time after improvement based on the

formula $($on slides$)$ and compare which part should be improved.