Can I get help with this please - step by step guide

Question 3. Consider the following function: f (a) = Va+V3-x (i) Find all x- and y-intercepts. (ii) Find all the stationary points. (you may convert the coordinates of the stationary point(s) into decimal for drawing purposes, however, follow the instructions on page 1 of this assignment.) (iii) Determine the intervals for which the function is increasing, and the intervals for which the function is decreasing. Classify all the stationary points as a global maximum or a global minimum point. (iv) Sketch the function by hand based on the information you gained through steps (i) to (iii). Label all the important points on the graph of the function