Given the following function and it's first and Second cervaties, determine each of the following. 4 f(x)= -x+8x-5 3 f'(x)= -4x+24x= -4x (x-6) f" (x) = -12x + 48 x = -12x (x-4) Find all intervals on which f(x) is decreasing Find all intervals on which f(x) is concave up Find the x values where the absolute maxinum and absolute minimum of f occur on the interval [1,1]