Hellooo merry christmas ! can someone please help mee? ik its a lot but even just a little help would be very mich appreciated :))

Jacob is driving through the mountains with his farily. As they drive, the car's GPS device
tracks their changing elevation, The graph shows the car's elevation from sea level in feet (y
axis) at different times measured in minules (x-axis) from the start of the jourey, Negative
values of elevalion represent heights below sea level.

a. Examine the zeros of the graph, and write a function that models this situation
Type your response here:

b. After 10 minutes, the elevation model changes and is given by the function e(x)-sqrtx-10
Use the Edmentum Graphing Tool to graph this function. Capture a screenshot of your
graph and paste it in the space provided
Type your response here:

VVrite a piecewise function modeling the car's elevation over time
Type your response here;

d Jacob wants to know the average rate of change of the cars elevation with respect to time
over the time interval [5, 7] Use the piecewise function you wrote in part c to find this.
Type your response here

Identify an interval over which you will get an average rate of change of elevation with a
sign opposite to the one you just found, Justify your answer by solving for that interval

+ For the function e(x)= sqrtx-10 (x > 10), consider the interval (a. b). If the starting point of
the interval, a, remains fixed and the endpoint, b keeps extending what eventuglly
happens to the sverage rate of change of elevation with respect to time?