The sister communities program pairs cities in Russia with cities in the United States that have a similar size and economic base. Visits are then exchanged between the sister communities to improve international understanding. The following table shows the program’s compatibility scores (0 to 100) for the 4 U.S. and 4 Russian cities about to join the program.

U.S.

Russian 1 2 3 4 1 80 65 83 77 2 54 87 61 66 3 92 45 53 59 4 70 61 81 76 Sister communities seeks a maximum total compatibility pairing.

Do

(a) through

(c) as in Exercise 11-13.