5. Let X be a continuous random variable with PDF
fX(x)= c(2+x), −2 < x < −1,
(a) Find the value of c such that fX(x) is indeed a PDF.
(b) Determine the CDF of X and sketch its graph.
(c) Find P(X < 1.5).
(d) Find m = π0.5 of X. Is it unique?
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