All code should be properly documented, commented and have proper unit testing implemented in main). Explain ALL lines of code. Assume that the data stored in each element is a character or integer (you may choose whichever you think is more convenient) You are not allowed to use Java library implementations of the data structures (queues, lists etc.) You should implement the internals yourself! Question: In C implement a recursive and an iterative version of a function which reads characters from stdin until a newline character is read and then prints them on stdout in reverse order. Hint: use getchar), putchar() (or getc), putc()). For the iterative version you may assume a fixed max length of the input