Quantizer. Suppose X is an exponential random variable with parameter ̀. Let Y = ⌈X⌉, i.e., Y = k for k ≤ X < k + 1, k = 0,1,2, ...
a. Find the pmf of Y.
b. Define the quantization error Z = X − Y = X − ⌈X⌉. Find the pdf of Z. (Hint: start by finding the CDF of Z)