Assume we are using the simple model for floating-point representation as given in this book (the representation uses a 14-bit format, 5 bits for the exponent with a bias of 15, a normalized mantissa of 8 bits, and a single sign bit for the number). a) Show how the computer would represent the numbers 5.49 and 20.5 using this floating-point format. b) Show how the computer would add and multiply these two floating-point numbers.