Please help! This is my last question so please answer all.Thanks!

(3 points) Let f(x) = 14 - 5x - x2. Find the critical numbers for f and the open intervals on which f is increasing (decreasing). 1 . The critical numbers for f are 2. f is increasing on the intervals 3. f is decreasing on the intervals Notes: For the first question, your answer should be a comma separated list of x values or the word "none". For the other two, your answer should either be a single interval, such as (0,1), a comma separated list of intervals, such as (-inf, 2), (3,4), or the word "none" 3 points) Let f(x) = 7 + 4x - x. Find the critical numbers for f and the open intervals on which f is increasing (decreasing). The critical numbers for f are f is increasing on the intervals f is decreasing on the intervals (3 points) Let f(x) = 8x - 6. Find the critical numbers for f and the open intervals on which f is increasing (decreasing). . The critical numbers for f are 2. f is increasing on the intervals 3. f is decreasing on the intervals (3 points) Let f(x) = 4x - 6x#. Find the critical numbers for f and the open intervals on which f is increasing (decreasing). 1. The critical numbers for f are 2. f is increasing on the intervals 3. f is decreasing on the intervals