SOLVE IT ASAP PLEASE

2. Find the local extrema points for f(x) = 3x4 - 4x3. Show your work. [K/U =4] 3. Find the intervals of concavity for f(x) = 2x3 - 3x2 - 12x + 1 . Show your work. [K/U = 4]4. In the next graph, given the graph of the derivative f '(x) of the function f(x). Explain ...." X -1 -5 -A a) Find the intervals where function f(x) is increasing or decreasing. [C=4]b) Find the intervals where function f(x) is concave upward or concave downward. [ C=4] 5. Determine the constants a, b & c so that the curve described by f(x) =ax3 + bx + c has a local extrema at (2, 11) and point of inflection at the point (1, 5). Show your work. [T/I =10]