Develop a method to approximate double integrals similar to what we did with the midpoint rule for sin

Write the paper based on MTH122 calculus course knowledge
[Application to the Earth Sciences] Develop a method to approximate double integrals similar
to what we did with the midpoint rule for single integrals. Write a 1-2 page report where you:
(a) Describe your idea for approximating a double integral.
(b) Describe how a double integral can be used to calculate the volume of a lake.
(c) Describe an experiment you could perform to measure the volume of a lake that involves
your approximation technique.