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(7) (4 marks) Perform the subtraction on the following given unsigned binary numbers using 2's complement method. Represent your final result using the plus or negative decimal format, whenever it is applicable. (a) 1001110001 (b) 100010101011 (8) (4 marks) Perform the subtraction on the given signed binary numbers using 2's complement method. Note that you first need to convert the decimal numbers into the appropriate format. Assume that we are using an 8-bit CPU. Represent your final result using the plus or negative decimal format, whenever it is applicable. (a) (+29)10+(49)10 (b) (29)10+(49)10 (9) (4 marks) Given a binary number 10010110 in an 8-bit CPU, calculate its original number in the decimal format, for each of the following formats it is represented in. (a) Unsigned binary format (b) Signed 1's complement format (c) Signed 2's complement format (d) BCD format