interval (0, 2). f(x) = 3 sin(x)+3 sin(x) (a) Find the open interval(s) on which the function is increasing or decreasing. (Enter your answers using interval notatie 7 3m Increasing 0, U ' 6 2 6 11,2 7 decreasing U 2'6 3 11 2'6 (b) Apply the First Derivative Test to identify all relative extrema. relative maxima (x, y)=(\ x )(smaller x-value) (x, y) = )(larger x-value) X relative minima (x, y) = )(smaller x-value) X (x, y) = ( (larger x-value)