The next module, A4 was one of the three to be completed on 27th August. It was estimated that this module would take 15.0 hours to develop; in fact it took 22.5 hours.
| Module | A6 | A5 | C2 | A4 | ||||
|---|---|---|---|---|---|---|---|---|
| Date Completed | 20/8 | 21/8 | 23/8 | 27/8 | ||||
| Actual | 33.0 | 37.5 | 48.0 | 22.5 | ||||
| Estimated | 37.5 | 30.0 | 37.5 | 15.0 | ||||
| X | -4.5 | 7.5 | 10.5 | |||||
| mR | 12.0 | 3.0 |
Using the information in the table above, calculate the values of X and mR that will be used to complete the rest of the column.