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A random variable X has a probability density function of the form fx(x) = K.e-5.*• u(x) = a) Find the value of "K" for which fx(x) this is a valid probability density function. b) Find the Mean Value of X (E[X]) c) Find the Mean Square value of X (E[X2]) d) Find the variance of X (02) e) Find the third central moment of X f) Find the probability of X >3