10. Perform the following additions and subtractions. Assume the numbers are stored in hexadecimal representation. a. 86C+ 32FA b. BDF4 +9EC6 c. 74F-D63E d. 59BA-8C4 11, Perform the following hexadecimal additions and subtractions. Assume the numbers are stored in 32-bit 2's complement binary numbers. Indicate the sign of the answer and whether overflow occurs. a. BBCA270C AE223464 b. E3BA265F E04589A9 c. E9B20F5D- FE605C8D d. 5FCA5243- AE223464