<image>Answer the following questions based on the statistical chart. Statistical chart of water bills in Xiaoming's house over 4 months.
(1) What is the average water bill in Xiaoming's house over these 4 months?
(2) Which month do you estimate month C is? What is your reasoning?
(3) What do you predict the water bill in Xiaoming's house will be for the next month? Explain your reasoning.