Please provide the steps for how to do each step, not just the final answer.

18. Each service starts on a different date because the services depend on each other. Enter the starting dates for the remaining services as follows: a. In cell D6, enter a formula without using a function that adds 4 days to the value in cell C6. b. In cell E6, enter a formula without using a function that subtracts 3 days from the value in cell C6. c. In cell F6, enter a formula without using a function that adds 2 days to the value in cell E6. d. In cell G6, enter a formula without using a function that adds 2 days to the value in cell C6. 19. Copy the formulas in Phase 2 to the rest of the schedule as follows: a. Copy the formula in cell D6 to the range D7:D9. b. Copy the formula in cell E6 to the range E7:E9. c. Copy the formula in cell F6 to the range F7:F9. d. Copy the formula in cell G6 to the range G7:G9. 20. In cell C11, enter a formula that uses the MIN function to find the earliest date in the project schedule (range C6:G9). 21. In cell C12, enter a formula that uses the MAX function to find the latest date in the project schedule (range C6:G9)