Question: Define: EA = (X)+ is the effective address equal to the contents of location X, with X incremented by one word length after the effective

Define: EA = (X)+ is the effective address equal to the contents of location X, with X incremented by one word length after the effective address is calculated; is the effective address equal to the contents of location X, with X decremented by one word length before the effective address is calculated; is the effective address equal to the contents of location X, with X decremented by one word length after the effective address is calculated. Consider the following instructions, each in the format (Operation Source Operand, Destination Operand), with the result of the operation placed in the destination operand.
a. OP X, (X)
b. OP (X), (X)+
c. OP (X), (X)
d. OP (X), (X)
e. OP (X), (X)+
f. OP (X), (X)+
g. OP (X), (X)
Using X as the stack pointer, which of these instructions can pop the top two elements from the stack, perform the designated operation (e.g., ADD source to destination and store in destination), and push the result back on the stack? For each such instruction, does the stack grow toward memory location 0 or in the opposite direction?

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