Problem 4-9 (Static) The R&D department is planning to bid on a large project for the development of a new communication system for commercial planes. The accompanying table shows the activities, times, and sequences required: ACTIVITY IMMEDIATE PREDECESSOR TIME (WEEKS) A 3 B A 2 C A 4 D A 4 E B 6 F (3,1) 6 G D,F 2 H D 3 I E, G,H 3 b. What is the critical path? (You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer.) c. Suppose you want to shorten the completion time as much as possible, and you have the option of shortening any or all of B, C, D, and G each one week. Which would you shorten? (You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer.) d-1. What is the new critical path? (You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer.) d-2.What is the earliest completion time for the new critical path? Completion time El weeks