Find the area of the shaded region. NOTE: Enter the exact answer. A = ***** 1 Y 2 y = x +1 y=x Use the function f(x) = 1920 - 20.9 to answer the following questions. (a) Find the interval(s) on which f(x) is increasing. Number of increasing intervals: Choose one (b) Find the interval(s) on which f(x) is decreasing. Number of decreasing intervals: Choose one (c) Find the interval(s) on which f(x) is concave up. Number of concave up intervals: Choose one (d) Find the interval(s) on which f(x) is concave down. Number of concave down intervals: Choose one (e) Find the x-coordinate(s) of any/all inflection point (s). Number of inflection points: Choose one