(i)[3]
With 3 intervals, apply the trapezium rule to estimate the value of $\int_{\pi}^{\frac{3\pi}{2}} \cosec x\,dx$, and state your answer correct to 2 decimal places.
(ii)[2]
From a sketch of $y = \cosec x$, explain whether the trapezium rule gives an overestimate or an underestimate of the actual value of the integral in part (i).