6) 1.6* The solutions to the quadratic equation x2-11x+22=0 are x=3 and x=6. What is the base of the numbers? 11) 1.11 Perform the following division in binary: 111011 + 101. 18) 1.18 Perform subtraction on the given unsigned binary numbers using the 2's complement of the subtrahend. Where the result should be negative, find its 2's complement and affix a minus sign. 1. (a) 10011-10010 2. (b) 100010-100110 3. (c) 1001-110101 4. (d) 101000-10101