four products (1, 2, 3, and 4) must be processed on one of four machines (a, b, c, and d). the times required in minutes for each product on each machine are shown below. machine product a b c d 1 10 9 16 12 2 8 14 17 5 3 19 20 11 7 4 8 18 5 10 if management wishes to assign products to machines so that the total time to complete all the products is minimized, then product 1 is assigned to group of answer choices machine a. machine b. machine c. machine d.