The R&D Project: There is an R&D project at a high-tech company to be managed by Joanna. She is now under pressure from the company's rivals to complete the project early with minimum cost. She has gathered the following information for project crashing. You will need to use such information to construct an AoA hetwork (1, Activity or 1 Total Marginal Activity Time Activity Cost Allowable Crash (days) ($1000s) Crash Cost time ($1000s) Normal Crash Normal Crash 6 4 200 240 A (1,2) 2 20 8 5 500 605 3 35 2 1 570 650 1 1 3 4 7 3 840 355 80 40 45 6 1 960 400 420 800 1 B (2,3) (2,4) D (3,5) E (4,5) F (5,6) G (5,7) Dummy (3,4) 1 Dummy (6,7) 2 2 01 W 400 710 10 30 N 3 3 D 4. $40 (3) 6 B 8, $35 1 F 3, $10 A 6, $20 (2) 2 (3) N C 2, $80 5 (2) G 5, $30 (3) (1) E 7. $45 4 (1) 7 Q 20 The first step of manual crashing the project by 5 days is: Select one: O a. Crash activity G by 2 days O b. Crash activity F by 2 days O c. Crash activity B by 3 days O d. Crash activity A by 2 days