Please show the work

ES EF LS LF Slack Activity Q R 40 42 Length 4 5 6 8 10 Predecessor NO M.P Q S.R SR S U V Information is shown below for the last 5 activities in a project with many activities. The network corresponding to this is shown below (M, N, O and P are activities before Q and R). S 40 V a) Fill in the table with the earliest start and finish times, the latest start and finish times and the slack for activities Q, R, S, U and V. b) What is the minimum completion time? c) Which activities are on the critical path? d) Which activity (or activities) have the greatest slack and how large is that slack? U R 42