I could use some help with the following calculus problems:

Use calculus to find the open intervals on which the function f (a) = a + 4v1 - a is increasing or decreasing. If the function is never increasing or decreasing, enter NA in the associated response area. increasing: decreasing:Using calculus, find the absolute maximum and absolute minimum of the function f (ac) = 7ac - 28ac + 3 on the interval [-3, 4]. absolute maximum absolute minimum =