I need to create a loop to calculate the compound interest of a Roth IRA each year. The function has to input p(principal amount), c(yearly contribution), r(return rate), and n(number of years). It has to output a v vector of values in the account the first day of each year. I have written a loop that should calculate the yearly compound interest through the y=equation, and then add it to the vector v. However this loop only prints out the initial values p. How do I make this create a vector of compount interests. I also have to plot the vector that comes out versus the year, but I have no idea what syntax to use to do that.