Please, can anyone help with this question? It's a C++ data structure question from one of the books. The topic is about "Time Complexity"

Thank you. Much appreciated.

Question 4: (a) A robot moves on a NxN grid. NxN starting in the top-left corner S and map moving either right or down at each step, until destination D is reached. Robot Determine the "big O" complexity of a program that prints all possible paths from S to D. (2 marks) (b) Let AC1..nl be an array of bits (1 or 0 and F() a function of time complexity e(n). Give the time complexity of the following C++ code fragment. Justify your result by considering different cases for A. (2 marks counter 0; for (i E 1: i