The table below shows the cost of production and output of maize. The price of maize is fixed $20.00. Use the information to answer the questions that follow.

Maize (bags)	Total Variables ($)	Total cost ($)	Total Revenue ($)
0	0	10	0
1	8	w	20
2	10	x	40
3	u	25	y
4	v	32	z
5	28	38	100

a. what is the value of total cost? Give a reason for your answer.
b. Calculate the values of u,v,w,x,y and z
c. Calculate the profit levels 1 and 4
d. In what market structure is the firm operating? Give a reason for your answer.