6. (3 pts) Below is a substitution table (S-box) expressed in octal (base-8, digits are 0-7). Note that it replaces two digits with one digit, cutting the size of the resultant string in half: 01234567 045036712 103615274 2 541 2 3 607 362407135 471260543 517354026 630572461 726741350 Use the table to replace each of the following 8-digit values with 4-digit values, by using the first digit of each pair to index the row and the second to index the column. a. 24 52 15 67 b. 66 51 37 05 c. 37 73 65 01