a. 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: In cell D6, enter a formula without using a function that adds 4 days to the value in cell 06. b. In cell E6, enter a formula without using a function that subtracts 3 days from the value in cell C6 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. C