Identify the early start, early finish, late start late finish for each activity

Using the following information:Build a network diagramIdentify the early start, early finish, late start late finish for each activityIdentify the critical pathIdentify the duration of the critical pathWhat is the float of Activity BWhat is the float of Activity HActivity Predecessor Duration in DaysA Start 3B Start 6c A, B 12D B 5E D 4F C 6G E,F 8H E 7I H 3