C. Correlation Analysis D. T-test, two independent samples Part 2: Problems 1. (10 points) The Ultimate Bank soon will be hocking up computer terminals at each of its branch offices to the computer at its main office using special phone lines with telecommunications devices. The phone line from a branch office need not be connected directly to the main office. It can be connected indirectly by being connected to another branch office that is connected (directly or indirectly) to the main office. The only requirement is that every branch office be connected by some route to the main office. The charge for the special phone lines is Php1000 times the number of kilometers, where the distance (in km) between every pair of offices is as follows: Distance between Pairs of Offices Branch 2 Main Branch 1 Branch 3 Branch 5 Branch 4 190 70 Main 115 270 160 190 Branch 1 100 110 215 50 70 Branch 2 100 140 220 120 Branch 3 115 110 140 175 80 Branch 4 270 215 120 175 310 Branch 5 160 50 220 80 310 Management wishes to determine which pairs of offices should be directly connected by special phone lines in order to connect every branch office (directly or indirectly) to the main office at a minimum total cost