1. You have been recently assigned to provide an accurate project schedule for a large construction company. You are evaluating the network diagrams for the construction project, and are using backward pass calculations to construct the schedule.

You are trying to calculate the latest start time for laying the foundation of building. The expected duration for this task is 120 days. The task must be completed within 300 days, while the expected completion is between 220 days. The latest finish date is 290 days. Based on this information, what is the latest start time of this task?