want a step by step and a clear hand written solution to all the problems

11. Perform the following hexadecimal additions and subtractions. Assume the numbers are stored in 32-bit 2s complement binary numbers. Indicate the sign of the answer and whether overflow occurs.

a. BBCA270C + AE223464

b. E3BA265F + E045B9A9

c. E9B20F5D FE605C8D

d. 5FCA5243 AE223464