need help with the following arithmetic questions:

A:

Calculate the following values by hand. All numbers represent unsigned 16-bit hexadecimal numbers. Make sure you show your work, including all borrows or intermediate steps, when doing the subtraction. The result should be written in hexadecimal.

B:

Calculate the following values by hand. All numbers represent signed 16-bit hexadecimal numbers stored in sign-magnitude format. Make sure you show your work, including all borrows or intermediate steps. The result should be written in hexadecimal.