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nal Exam At the input of an amplifier, a signal has an amplitude distribution given by fA(a) = Klale-a2, aER where K is a constant. (a) 1.5 pt - Find the value of K. (b) 1.5 pt - The linear region of the amplifier is (-2,2), outside of which the signal is subject to ins within the linear severe clipping. Computer the probability that the signal amplitude A remains wit region. (c) 1 pt - The power of the input signal is proportional to A2. Find the PDF of Y = A2. d) 1 pt - Find a formula for Pr( A2n