Picture 1-3 is ANSWER TASK a)

Variable Cells A B Distance Calculation () D E LL F A B C D E F A =D13*D4 =E13*E4 =F13*F4 =G13*G4 =H13*H4 =113*14 B =D$13*D5 =E$13*E5 =F$13*F5 =G$13*G5 =H$13*H5 =1$13*15 C =D$13*D6 =E$13*E6 =F$13*F6 D =D$13*D7 =E$13*E7 =F$13*F7 =G$13*G6 =H$13*H6 =1$13*16 =G$13*G7 =H$13*H7 =1$13*17 =G$13*G8 =H$13*H8 =1$13*18 E =D$13*D8 =E$13*E8 =F$13*F8 =E$13*E9 =F$13*F9 =G$13*G9 =HSI3*H9 =1$13*19 F =D$13*D9 Results of Solver =SUM(D16:121) A B D E F G H J K L M N 1 2 3 A B C D E F 4 5 6 7 8 9 F 06853 ABCDEE 10 15 683009 13 5wwow 5 3 15 8 10 3 13 0 14 14 0 10 11 9 EROESO 10 11 10 11 12 13 A B C 1 1 D E F 0 0 2 2 14 15 16 17 18 ABCDEE 6500409 A B C D E F 0 0 0 6 0 8 0 0 19 5 8 0 20 3 10 0 0 0 21 F 15 0 0 73 22 23 OOOOOO OOOOOO 24