3.63 In a simple detection scheme, the received signal is X = A+W, where it is given that A is the desired signal of magnitude 9 Volts, and the noise is uniformly distributed in the range 5 to 5. A detection probability, pd, of 0.99 is desired. (a) Find the value of threshold, xT , required to obtain this probability of detection. (b) Determine the corresponding probability of false alarm, pfa..