how to solve step by step

8. [0.5] Suppose that we use the 10 's complement of X to represent X. Show that AB can be performed as A + (-B); i.e., by taking the 10 's complement of B (00980099) and adding it to A (90009951) (and ignoring the carry out of the 8-digit decimal values). AB=(1)89029851AB=(1)89018941AB=(1)88008951AB=(1)89108941 11. [0.5] Represent the number (+46.5)10 as a floating-point binary number with 24 bits. The normalized fraction mantissa has 16 bits and the exponent has 8 bits. Note: first, you need to convert the decimal number to the binary number. 46.5=(1011110.1)2=0.1011110126 Sign of Mantissa (1bit) Mantissa (15 bit) Exponent (8bit) 01011110100000000000001110(+6) 46.5=(101110.1)2=0.101110126 Sign of Mantissa (1bit) Mantissa (15 bit) Exponent (8bit) 010111010000000000000110(+6) 46.5=(1010110.1)2=0.1010110126 Sign of Mantissa (1bit) Mantissa (15 bit) Exponent (8bit) 0101011010000000000000110(+6) None of them