1.17 Perform subtraction on the given unsigned numbers using the 10's complement of the subtra- hend. Where the result should be negative, find its 10's complement and affix a minus sign. Ver- ify your answers. (a) 6,428 - 3,409 (b) 125 - 1,800 (c) 2,043 - 6,152 (d) 1,631 - 745 1.18 Perform subtraction on the given unsigned binary numbers using the 2's complement of the sub- trahend. Where the result should be negative, find its 2's complement and affix a minus sign. (a) 10011 - 10001 (b) 100010 - 100011 (c) 1001 - 101000 (d) 110000 10101 1.19 The following decimal numbers are shown in sign-magnitude form: +9,286 and +801. Convert them to signed-10's-complement forin and perform the following operations (note that the sum is +10,627 and requires five digits and a sign). (a) (+9,286) + (+801) (b) (+9.286) + (-801) (c) (--9,286) + (+801) (d) (-9,286) + (-801) 1.20 Convert decimal +46 and +29 to binary, using the signed-2's-complement representation and enough digits to accommodate the numbers. Then perform the binary equivalent of (+29) + (-49), (-29) + (+49), and (-29) + (-49). Convert the answers back to decimal and verify that they are correct