Given the following information about a small project, task duration immediateestimates predecessorsa 2 days noneb 5 days ac 4 days bd 9 days ae 4 days b & df 12 days e & cdraw a network diagram. identify the critical path, earliest start and finish and slack for each task. using ms excel, produce a gantt chart for this project. what would happen if a new estimate for task d increases its expected duration from 9 days to 11 days? would the project take longer? would anything else change?