Draw a ccpm network diagram and gantt chart

Question

Question: Apply critical chain scheduling principles to following, draw a CCPM network diagram and a Gantt chart. Revise the estimated time durations by 50% except round up the odd durations (ie. 3 becomes 4). Draw a CCPM network diagram and a Gantt Chart. How would these diagrams differ from the ones generated using traditional scheduling techniques

ID    Description    Predecessor    Time
A    External Specifications       0    8
B    Review Design Features     A    2
C    Document New Features    A    2
D    Write Software                  A    60
E    Program and Test              B    60
F    Edit and Publish Notes        C     2
G    Review Manual                  D     2
H    Alpha Site                        E,F    20
I    Print Manual                       G    10
J    Beta Site                          H,I    10
K    Manufacture                      J      12
L    Release and Ship               K       3