Find a lower sum approximation to find the net area bounded by the function f(x)=x x^2 and the x-axis over the interval [-1,1] using n=6 rectangles. Round your answer to 2 decimal places. Find a upper sum approximation for net area bounded by the function f(x)}=x x^2 and the x-axis over the interval [-1,1] using n=6 rectangles. Round your answer to 2 decimal places. Average the answers you got from then first two questions of this quiz and round to 1 decimal place.