Produce graphs of f that reveal all the important aspects of the curve. Then use calculus to find the following. (Enter your answers using interval notation. Round your answers to two decimal places.) f(x) = -2x6 + 4x5 + 140x3 - 120x2 Find the interval(s) of increase. Find the interval(s) of decrease. Find the inflection points of the function. smaller x-value (x, y) = larger x-value ( x, y ) = Find the interval(s) where the function is concave up. Find the interval(s) where the function is concave down