(a) Draw a project network. (i) (c) What are the critical activities? (Enter your answers as a comma-separated list.) What is the expected project completion time (in weeks)? (Round your answer to two decimal places.) weeks your answer to four decimal places.) Should the athletic director begin planning the track and field team before January 1 ? (The probability for finishing on schedule should be at least 0.9.) Since the probability that the track and field team will be ready by April 1 is -- Select--- than 0.9 , the athletic director begin planning before January 1