Replace the operand x in the first instruction, load x$,$ with the operand a $,$ then reassemble the program. The assembler should discover that you forgot to provide a data declaration for a$.$ The assembler forces you to keep track of all your data and their initial values by declaring them at the bottom of the program. What is the error message? Correct this error before going on$.$

Replace the operator add with the operator multiply in the second instruction. The assembler should discover an unrecognized opcode. What is the error message? Correct this error before going on$.$

Replace the number $2$ with the number $40000$ in the first data declaration. What is the error message? Correct this error before going on$.$

Delete the space between add and y in the second instruction. What is the error message? There must be at least one blank space or tab between an operator and its operand. Correct this error before going on$.$

Insert a blank line after the second instruction. What is the error message? Assembly language typically has a fixed format, which requires an instruction to appear on each line of a program. Correct this error before going on$.$

Insert a blank space, followed by subtract, at the end of the second instruction. What is the error message? The instruction has three lexical items, the assembler expects the first one to be a label ending with a colon $($:$).$ Don't correct this error yet.

Oblige the assembler by inserting a colon $($:$)$ after add $($be sure that there are no blank spaces between the colon and the d$.$ Note the error detected. Now change y to add $.$ The assembler treats subtract as an undeclared data label, which you could remedy by declaring it at the bottom of the program.