Suppose you are implementing an Ada compiler, and must support arithmetic on 32-bit fixed-point binary numbers with a programmer-specified number of fractional bits. Describe the code you would need to generate to add, subtract, multiply, or divide two fixed-point numbers. You should assume that the hardware provides arithmetic instructions only for integers and IEEE floating-point. You may assume that the integer instructions preserve full precision; in particular, integer multiplication produces a 64-bit result. Your description should be general enough to deal with operands and results that have different numbers of fractional bits.