2. Manually convert the following numbers: 1) (985)10 to a base 7 number, ii) (3124)s to decimal number, and iii) decimal 3,246,217,65l into its equivalent 256 base number in dotted decimal notation. (be sure to show your work). 3. Given the two binary numbers (01101011)2 and (01011110)2, using signed magnitude arithmetic: i) add the two numbers and ii) subtract the second number from the first number. (be sure to show your work)