solve questions in C language

In an instruction like: z=x+y, the symbols x,y, and z are examples of a. output b. vsibles C. variables d. instructions Which text most closely resembles the form in which one instruction is stored in a single location of a fypical computer's memory? a. w=(x+y)(yz) b. w=x+000111(y1110101) c. Add 34, \#9, 25 d. (Mul45,2)+(Mul33,5)+(Mul4,8)