Answer:

Step-by-step explanation:
Elastic Potential Energy
It's the term that expresses the amount of work an object can do due to its deformation. It's commonly applied to springs where the compression distance or elongation (x) is related to the Force (F) needed to stretch it. It can be found as

Where k is the spring constant.
In this problem, we don't know the value of k, but it can be determined with the data provided. Though there is not a graph as suggested in the question, we have two points in the form (x, F) to find k. The points are (0,0) (10 m,15 N). Applying the Hooke's law

we can find the value of k as the slope of the line:


Now we compute the EPE when x=7 m

The best approximate value is the third option:
