(1) Using an 8-bit pattern, calculate the result for the operation (-42-22). Firstly, convert each number to two's complement. Secondly, calculate the result. Lastly, convert the result back to decimal. (5) (2) Flip the 3 rightmost and the 4 leftmost bits of a 16-bit number A(1101100100010101) first. Suppose that the result is B. Then continue to set the 5 rightmost bits and the 6 leftmost bits of B. Show the masks and operations. (5) (3) A computer has 4GB of memory. Each word is 2 bits. Calculate how many bits are needed to address each single word in memory (5) (4) The following two binary numbers are represented by IEEE 754 single floating point number. Calculate the subtraction for these two numbers using IEEE 754 single floating point format. Do not convert them to real numbers. (5") 01000001010000000000000000000000-01000001000100000000000000000000