how to calculate the interval time where th project is ahead of the planning schedule

giving the following definition

The data given in the table below shows PV, EV, and AC values in thousands of dollars for the first 7 weeks of a project's execution before its completion. EV (S) Week Number 1 2 3 Activity DD A B D E F G PV (S) 7000 10000 15000 23000 30000 50000 70000 AC (S) 8000 15000 20000 30000 40000 55000 75000 10000 17000 20000 25000 30000 45000 60000 4. 5 6 7 Indicate the interval of time where the project is ahead of the planned schedule? Select one: a. From week 1 to week 5 bon week 5 c. From week 5 to week 7 from Rakitoveeki sul lia w The Earned Value (EV): Terminology Below are the basic elements for calculating EV and use its figures to make future project performance projection: EV - Earned Value: This is the real budgeted cost, or "value", of the work that has actually been performed to date. AC - Actual cost of work performed: The cumulative total costs incurred in accomplishing the various project work packages. PV - Planned Value: A cost estimate of the budgeted resources scheduled across the project's life cycle (cumulative baseline). Steps in Earned Value Management Clearly define each activity including its resource needs and budget 1. 2. Create usage schedules for activities and resources Develop a time-phased budget (PV) 3. Total the actual costs of doing each task (AC) 4. 5. Calculate both the budget variance (CV) and schedule variance (SV)