calculus

Consider the given function.
f(x) = 3 sin(6x) text(, ) 0<=x<=(3pi)/2
(a) Find the Riemann sum with six terms, taking the sample points to be right endpoints. (Give your answer correct to six decimal places.)
R6 =

(b) Repeat part (a) with midpoints as sample points. (Give your answer correct to six decimal places.)
M6 =

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