Please solve from scratch and do not copy-paste from any existing solutions

Note that Problem 3 is related to Problem 2

Problem #2 XYZ Project has 20 activities, each activity uses 4 different resources with their limits given in the following table. Activity Predecessors Duration (day) 6 R1 R4 3 4 A 3 2 6 7 5 2 2 B D E F G H 1 J K L M N O P Q R S T Daily Resource Requirements (unit) R2 R3 5 2 2 2 3 5 2 3 2 4 4 2 5 4 3 5 3 5 2 3 4 1 4 9 4 1 4 3 5 5 4 0 3 2 4 3 1 5 4 6 3 3 2 4 3 2 8 2 2 2 2 1 4 4 3 5 5 4 6 3 2 3 4 4 5 4 5 3 3 2 4 6 1 6 2 7 1 A, B D A, B G H F C, E E, G, H I, K F, L L J, M, N o D, O PR 2 4 2 3 NN 5 2 5 8 2 6 2 NWN Daily Resource Availability Limits 8 12 12 15 It is required to schedule the project so that the daily resource requirements do not exceed the resource limits. Problem # 3 Consider the project presented in Problem 2: Implement resource levelling and smoothing for each individual resource over the project life. Implement resource levelling and smoothing for both R1 and R2 with higher priority for R1 (R1 cost is triple that of R2)