A. (2 points) Assume we are on a x86, 64-bit Linux OS and we have the following code below. Assume the string "hello" is stored at the memory address 0x800020. Describe the values of the registers RAX,RBX,RCX,RDX, RDI and RSI immediately before jumping to the function foo (how are these registers setup per the Linux calling convention). If the register is not used for this operation, set it to 0. unsigned int foo (unsigned int a, char *str) { return 65; int main() { int b = foo (3, 'hello''); return b; B. (2 points) When foo() executes the line "return 65", it is done executing and will return back to main() where it executes "return b". How does the processor know to go to this line next? (Hint: stack) A. (2 points) Assume we are on a x86, 64-bit Linux OS and we have the following code below. Assume the string "hello" is stored at the memory address 0x800020. Describe the values of the registers RAX,RBX,RCX,RDX, RDI and RSI immediately before jumping to the function foo (how are these registers setup per the Linux calling convention). If the register is not used for this operation, set it to 0. unsigned int foo (unsigned int a, char *str) { return 65; int main() { int b = foo (3, 'hello''); return b; B. (2 points) When foo() executes the line "return 65", it is done executing and will return back to main() where it executes "return b". How does the processor know to go to this line next? (Hint: stack)