lVll' ZOZ necntatlon ACthlty Week 4 2. Now suppose the graph represents the function 31(3) given by y(a:) = f {(t) (it: for I] U S :1: g 6. Note that I is a piecewise function whose graph is not shown. 1' 2 (a) Over which intervals is 5 positive? Over which intervals is l negative? Over which intervals is I zero? (b) Over which intervals is 5 increasing? Over which intervals is l decreasing? Over which intervals is l constant? (c) Determine [or approximate) the maximum of I. (d) Determine (or approximate) the average of l on [0, 6]. (e) Determine the difference: y[3) y[1)