Letf(x)=42xx^2. Find the open intervals on whichf is increasing (decreasing). Then determine thex-coordinates of all relative maxima (minima).

1. f is increasing on the intervals 2. f is decreasing on the intervals 3. The relative maxima off occur at x = 4. The relative minima off occur at x = Notes: In the first 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". In the last two, your answer should be a comma separated list of x values or the word "none"