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(a) Using trapezoidal rule estimate the area bounded by the curve `y=3x^2 −2` and the lines
x=−4, x=4 and x−axis.
(b) Find the actual area bounded by the curve `y=3x^2−2` and the lines x=−4,x=4 and x−axis.
(c) Calculate the percentage error when trapezoidal rule is used.