need help with problems 13.18-13.20

13.18 Using the data in the table below, complete the table by calculating the cumulative planned and cumulative actual monthly budgets through the end of June. Complete the earned value column on the right. Assume the project is planned for a 12 -month duration and a $250,000 budget. 13.19 Using the data from Problem 13.18, calculate the following values: 13.20 You are calculating the estimated time to completion for a project of 12 months' duration and a budgeted cost of $500,000. Assuming the following information, calculate the Schedule Performance Index and the estimated time to completion (figures are in thousands)