The following function is positive and negative on the given interval.

f(x)=sin2x; 0,34

a.

Sketch the function on the given interval.

b.

Approximate the net area bounded by the graph of f and thex-axis on the interval using aleft, right, and midpoint Riemann sum with n=4.

c.

Use the sketch in part(a) to show which intervals of 0,34 make positive and negative contributions to the net area.