give me the the only right answer for part a to d, please.

4 2 The following is a table of activities associated with a project at Ratay Ishfaq's software firm in Chicago, their durations and what activities each must precede: Activity Duration (weeks) Precedes A (start) 1 B,C B 6 F 1 E E F F (and) This exercise contains only parts b, c, and d. b) The activities on the critical path are c) The total project completion time for Rafay Ishfaq's software firm is weeks. (Enter your response as a whole number) d) Determine the stack time for each of the activities. (Enter your responses as whole numbers.) Activity Slack Time (weeks) B E F What is the total slack for the non critical this in the ninet? I wankis) Enter WWF MADONA A whole number