Kawere Engineers is considering assignment of engineers to different projects to minimize the difference covered by the engineers to the project as follows. P1 P2 P3 P4 P5 E1 50 40 47 48 49 E2 60 70 80 90 100 E3 30 50 60 70 80 E4 20 40 50 60 70 E5 15 17 20 25 28 Required; a) Optimal assignment plan to minimize distance covered. [7 Marks] b) What is the minimum distance covered based on the optimal assignment? [ 8 Marks]