Afamily of functions is given by f($) : (k bah\"i, where b % 0. 1. Find the critical points of fix], the intervals on which it is increasing and decreasing, and then classify the critical points as local maxima or minima. 2. Find all inflection points. Determine intervals at which the function is concave up or concave down. 3. For what values of k and b does the function has an inflection point at x=4.5, and y = 4_4'5. Find the expression of the function. Enter the value of k in the blank below. Round your answer to two decimal places