Please solve the problems and construct the network diagrams by hands. Do not use any software. Use the critical path method

1- la company will make a new investment depending on the information given below. Draw the network diagram of the project and the find the minimum required time to finish the project and the critical path. Activity A Predecessor B A Duration (day) 10 20 30 20 7 9 D E F G 25 H I J K A B E G C GC H, F, D H, F, DI K,J K, KJ NL O, M 18 20 10 12 L M N wo 00 00 O 4