4) Let us consider a block code where b = [b1 b2 b3 b4] be the message and c = [C1 C2 .........C7] be the codeword, such that C1 = b1; C2 = b2; C3 = b3; C4 = b4; C5 = bi b2b4; C6 = b2 b3 b4; C7 = bi o b3 b4. 1. Find the generator matrix. II. Determine parity-check matrix. III. Determine all the codewords of the code. Also show the necessary calculations. IV. Decode the received signal vector 1000101 by computing its syndrome. Show the syndrome vector table (for all error bit positions) required for the identification of error bit