Determine the area under graph of f(x) = 0.05x^4 - 3.61x^2 + 97 over interval [5,9] by dividing interval into 4 subintervals. Use left endpoint of each subinterval. Area under graph of f(x) = 0.05x^4 - 3.61x^2 + 97 over interval [5,9] is approximately?