please answer the below question:

Crashing Activities :

First Determine the initial time and the overall cost of project

Second, Define the critical path activities

what is N/A ?

Project Overhead Cost: 5600/day Activity Predecessor Normal Duration Crash Duration Normal Cost of Activity ($) Additional Cost/day to Crash ($) 1,200 A 1.800 600 1,700 400 1,500 700 EF 1.900 500 Initially Run 1 Run 2 Run 3 Run 4 Run 5 Normal Days Activity Crash Cost Duration Day Days Days TF Saved Du TF Saved Dr TF Saved Dur TF Saved Our TF Saved OwTE ola Cost Savings Project Cost Project Duration