11.7 Three investment alternatives (A, B, and C) are under consideration. The discounted present worths (PW) are $30,000, $24,000, and $18,000, respectively. The three alter- natives have very different rankings on time required to fill a customer's order (T) and flexibility (F). The following weights have been assigned to the three factors (PW, T, and F): 40, 35, and 25. On a scale from 1 to 10, the following ratings have been assigned to the three alternatives for the three factors: A B Present worth (PW) 10 6 Fill time (7) 6 Flexibility (F) 5 7 10 8 10 8 Using the weighted factor comparison method, which investment alternative is recommended? 11.8 Which investment alternative is recommended in Problem 11.7, if a. the weightings for the three factors are 50, 10, and 40? b. the rating values for fill time for A, B, and Care 5, 7, and 10, respectively? c. another factor is introduced, safety (S), the weights assigned to the factors (PW, T, F, and S) are 30, 20, 10, and 40, and the rating values for S are 10, 8, and 9 for A, B, and C, respectively