a. (15 points) Memory Architecture. Describe the stack in the address space in generalities. Specifically, address where in memory the stack would be located, what the stack structure looks like when data is pushed onto the stack and popped off the stack. Discuss what register values are placed onto the stack, where user variables are placed within the stack, where arguments would be placed in the stack relative to pertinent register storage within the stack, and finally how program control flow is implemented using the stack. How does the stack structure get affected when a buffer of size non-binary is allocated by a function (ie buffer size which causes misalignment within the stack)? When a stack grows, in which direction, relative to overall memory, does a stack consume memory?