The table below shows the number of floating-point operations executed in 3 different programs and the runtime for these programs on three different computers. 5. Program Program 1 Program 2 Program 3 Floating-point operations 5 x 109 20 x 109 40 x 109 Computer A 2 20 200 Execution time in Seconds Computer B 5 20 50 Computer C 10 20 15 a) Which computer is faster according to total execution time? b) How many times faster is this computer than other two computers