feel free to use R code

Question 2. The time it takes for a computer to solve a mathematical problem is determined using 5 types of software and 3 types of operating system. A randomized block design is applied with the operating systems treated as blocks. The data is below. Time [seconds] Operating System Software 1 2 A 15 13 B 21 12 C 3 2 25 D 14 12 E 15 12 Part A. Which softwareloperating system is the quickest at solving the problem? Part B. Test whether operating system 3 is faster on average than the average of operating systems 1 and 2