(a) In ASCII, the letters A,B,C,...,Z are represented by 65, 66, 67, ..., 90 respectively. Convert the word TALK into a bit stream by converting each letter in turn into an integer, turning the integers into binary (strings of 7 bits), and then juxtaposing the binary strings. (b) Give the first 8 bits produced by the LFSR with the rule xn = xn1 + xn3 and with x1 = 1, x2 = 0, x3 = 1. What is its period? (c) Encipher TALK using this LFSR.