ATH 1524 7.2.4b [ 138770290 ] A project manager is considering hiring ONE new employee, either a jr programmer or a sr programmer, to help complete a large scale project. The cost (in dollars) of the project is given by C(x, y) = 612In (x2y) + 22xy + 209x - 27y + 1000 where a represents the number of jr programmers and y represents the number of sr programmers working on the project. Use marginal cost to determine which of the following options is the MOST cost effective. O a) The project manager should hire one more jr programmer. O b) The project manager should hire one more sr programmer. O c) It is NOT cost effective for the project manager to hire at this time. O d) There is not enough information provided.