Problem 4 Example 2-] from the notes, the problem associated with determining how much water should be supplied from each possible supply source, was formulated in standard form as: Min: 2(3) = 500m + 100%: + 20001:: M; Xl+ X2 + K3 2 I50 (Ell) 1000 Xl' 1100):: + 500m 2 0 {uZ} -x1 2_> -25 {u3) -x2 2_> 420 (ml) -X3_ 2 -100 (u5) x1 3 0 {u6) x2 3 0 {117) x; 3: 0 (uS) Some information obtained at the optimal solution is presented in Table 4-1. Table 4-1. Some information pertaining to optimal solutions of \"Example 2-1\" for use in Problem 4 2@*) = 2137,3125 Variable Value X1 25.0000 x2 546815 X3 70.3 125 a [2 pts) To minimize cost of the water supply, how much water should be obtained from source 2 (the aquifer)? Present your answer in terms of mgd to four {4) decimal places b (2 pts) Which of the eight constraints are binding? c (2 pts) What is the slack in the third and fifth constraints? Slack in third constraint = Slack in fifth constraint =