table below to answer the question(s) that follow: activity activity optimistic times (weeks) predecessor most likely pessimistic A 9 15 21 B 13 21 23 C A 6 9 18 D A 23 35 47 E B 19 26 27 F C 23 29 41 G D,E 14 20 26 H F,G 2 5 8 WHAT ARE THE ESTIMATED EXPECTED COMPLETION (mean) times (in weeks) for activities A-H? what is the critical path for this project network? If the early start for activity A is equal to 23 months and the duration of Activity a is equal to 5 months, what is the earliest finish activity A? If the earliest finish activity C is equal to 10 months and its duration 3 months, what is its earliest start