The question is down below

1. [-/4 Points] DETAILS SPRECALC7 2.3.003. MY NOTES The function f graphed below is defined by a polynomial expression of degree 4. Use the graph to solve the exercise. (a) If f is increasing on an interval, then the y-values of the points on the graph --Select- as the x-values increase. From the graph of f we see that f is increasing on the Intervals (Enter your answer using interval notation.) (b) If f is decreasing on an interval, then the y-values of the points on the graph -Select-|as the x-values increase. From the graph of f shown above, we see that f is decreasing on the intervals (Enter your answer using Interval notation. )