Approximate the area under the graph of f(x) = 0.05x^4 -3.61x +95 over the interval [5,9] by dividing the interval into 4 subintervals.

Approximate the area under the graph of f(x) = 0.05x^4 -3.61x² +95 over the interval [5,9] by dividing the interval into 4 subintervals.