Please draw network and use PERT solution

Ana and Darcy are going on holiday. The preparation they need to make prior to their departure can be broken down into 21 activities, which can be carried out at the same time, Subject to constraints which require that certain activities have been completed before others begin. After careful investigation Darcy has provided the data shown Table 1 regarding the constraints on which activities must be completed prior to others beginning, and what she thinks are the most likely, optimistic, and pessimistic times for completion of each task. Note: You will need to use PERT for this question. 6 Activity Duration (days) Description Predeeessor Optimistic Most Likely Pessimistic A Get Travel Brochures 6.50 7.25 8.00 B Renew passport 21.50 22.00 23.70 C Purchase new luggage 1.50 1.90 2.30 D Decide on destination A 8.65 9.85 11.65 E Get Visa. D 9.30 9.50 11.50 F Find cheapest ights D 5.50 6.50 7.50 G Purchase tickets B, E, F 0.50 1.00 3.00 H Get travel insurance C 0.50 0.80 2.00 I Find Hotel D 4.60 4.80 5.60 J Book Hotel G, I 1.50 2.00 2.50 K Cancel papers .l 0.80 1.00 1.80 L Packing List .I 0.50 1.00 1.50 M Pack Bags C 5.50 5.60 7.80 N Book shuttle H, L, M 0.50 0.60 2.80 O Redirect mail .1 0.25 2.00 2.25 P Catch Shuttle Bus to Air N, K, O 0.20 0.20 0.80 port Q Get travellers checks P 0.10 0.20 0.30 R Check in Bags P 0.20 0.25 0.30 S Fly to Destination Q, R 2.00 2.10 4.30 T Book into Hotel S 0.05 0.10 0.15 U Have Vacation T 10.65 11.85 13.65 Table 1: Precedence constraints and estimates of task duration (a) Draw a network representing this project. (1)) Determine the critical activities and critical path