What is the estimate of the area under the curve of f using rectangular approximations and sample points on the interval [-1.5, 1.5]? Evaluate the function at: x=-1.3 on [-1.5, -1] x=-0.7 on [-1,0] x = 0.7 on [0,1] x=1.3 on [1, 1.5] Note: Round to the nearest hundredth.