Please show the formula used on MS. Excel.

PM.58 Tech Solutions XYZ makes accessory products for tablet computers. Below are all the activities required to develop a new wireless keyboard and cover combination: Activity Duration (days) Immediate Predecessor(s) 6 B 12 5 D 7 E 4 F 11 G 18 B,D,E DE F GH H 5 1 4 J 17 1 What is the overall duration of the project (in days)? Nmero days What is the earliest day you could start activity G? (Write the day number in the field below.) Nmero What is the earliest day you could finish activity F? Nmero What is the latest day you could start activity B? Nmero What is the latest day you could finish activity B? Nmero What is the slack time for activity G? Nmero days What would be the overall duration of the project if activity C were increased by 5 days, from 5 to 10 days? Nmero days