The table below shows the execution time in percentage for various sections of a code. Using the Amdahl's law equation shown below, calculate and answer the following questions. Clearly show all your steps. Section Time spent (%) Read data 20% Computation 60% Write back 15% Final 5% Taffected Timporved + Tunaffected improvement factor 1. Which section takes the least execution time and which section takes the most execution time? (2 Points) 2. By reducing the execution time of the read data section, can the entire code gain a speed-up of 22 (4 Points) 3. By reducing the execution time of the computation section, can the entire code gain a speed-up of h (4 points) 4. Which of the two sections' execution time can be reduced so that the entire code can gain a speed-up of 4? (5 Points)