3. [10\%] Write a piece of pseudo-code to plot the following graph. Assuming that the plotting function has been provided as DrawSquare (x,y,r), which draw a square of size 2r with center (x,y) (1) Pseudo-Code to plot following graph. (4\%) (2) Write the recurrence equation for your algorithm. (3\%) (3) Plot the recursion tree to derive the solution of T(r). (3\%) (Note: r is the input size, which is the power of 2 . The time complexity for drawing one square is O(1) ). (Hint: The input of function can be: int x, int y, int r )