Please help me with my math. Annie says all of the graphs in Problem 1 are functions. (a) Do you agree with Annie that all of the graphs are functions? Support your answer with reasoning. (b) Annie's brother claims, “A graph of the balance in a bank account over time will always be a function.” Do you agree or disagree with him? Explain why. (c) Annie's sister says to her brother, “I think you got it backwards. I think you meant to say that any function could represent the amount of money in a bank account.” Do you think Annie's sister's statement is true or false? Explain why.