Using the network below and the additional information

Using the network below and the additional information provided, find answers to the following questions.(a) What is the crash cost per day per activity?(b) Which activities should be crashed to meet a project deadline of 13 days at minimum cost? State the number of days you will crash each activity.(c) What is the additional cost to crash the project?Critical path = B-C-D = 15ActivityNormal timeNormal total costCrash timeCrash total costA4$3003$360B3$2501$330C7$4004$550D5$1503$250(Points : 25)