For the function:

f(x)=2xe^-x/3 +7

(a)Find and state the intervals on which the function is increasing or decreasing

(b)Determine thex-value(s) where there is a local max or min - clearly label.

(c)Find and state the intervals on which the function is concave upward or concave downward

(d)Determine thex-value(s) where there is a point of inflection.