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**Please Help** on
.

Find:

(a) the interval(s) on which f is increasing,

(b) the interval(s) on which f is decreasing,

(c) the open interval(s) on which f is concave up,

(d) the open interval(s) on which f is concave down, and

(e) the X-coordinate(s) of any/all inflection point(s).

f(x)= (x^4) - (4802 x^2) + 9604