please do it in computer not by hand

Identify the critical path for the following three scenarios of a project activities (tables given below) and their required times to be completed in addition to their predecessors for developing a 'Website: Activity Description Duration (weeks) Preceding Activities A Determine user needs 3 B Review s/w and languages 1 Purchase software 4 D Design format and style 4 B E Write programs 2 A F Review outcome product with user 5 G Make revisions 1 D, F H Select server site 3 E I Install on server and test 6 G J 3 HI 1. Draw the path. 2. Calculate the early finishing time (forwards calculations) 3. Highlight the total time to complete the project (weeks) 4. Calculate the late finishing time (backwards calculations) 5. Calculate the slack time of the non-critical path activities 6. Identify the critical path (highlight critical path activities)