I need help with graphing and piecewise

For this discussion one must solve the problem. All work must be shown on on the word document to allow to attach your graph or PDF file.

The water level in a retention pond started a 5 ft (60 in.) and decreased at a rate of 2 in./day during a 14-day drought. A tropical depression moved through at the beginning of the 15 day and proceed rain at an average rate of 2.4 in./day for 5 days.

a. Write a piecewise – defined function to model the water level L(x) (in inches) as a function of the number of days x since the beginning of the drought.

b. Graph the function.

SHOW ANY STEPS THAT WERE TAKEN