1. [1+324 marks] Let f(a:) = :I:2 + 4:1: + 9. 9(33) : (a) [1 marks] Find f o g o h(a:) (b) [3 marks] Determine the domain of f o g o h(:r) and state your answer in interval notation. 2. 3+3+3=9 marks For each given equation, you are required to do the following: (a) Plot the graph of the equation. (b) Use the vertical line test to explain if the equation represents a function or not. If the equation represents a function, draw multiple vertical lines (representing all vertical lines) on your plot from part a) to explain why. If the equation does not represent a function, draw one vertical line on your plot from part a) to explain why. 36 - x, if - 6