What is the constant for number 2?

(a)  

What is the constant for number 3?

(a)  

What is the constant for number 4?

(a)  

What is the constant for number 5?

(a)  

What is the variable for number 1?

(a)  

What is the variable for number 2?

(a)  

What is the variable for number 3?

(a)  

What is the variable for number 4?

(a)  

What is the variable for number 5?

(a)