Using Matlab!

1. Using estimates of rainfall, evaporation, and water consumption, the town engineer developed the following model of the water volume in the reservoir as a function of time

V(t)= 1e9 +1e8*(1-exp(-t/100))- r*t

Where V is the water volume in liters, t is time in days, and r is the towns consumption rate in liters per day. Write two user-defined functions. The first function should define function V(t) to evaluate V for any input of . The second function should use fzero to compute how long it will take for the water volume to decrease to x percent of its initial value of Liters. The inputs to the second function should be x and r. Test your functions for the case where x= 50 percent and r = 10⁷ Liters/day.