Questiona) Solve the trigonometric equation: $5 \sin \phi+3=0$ for values of $\phi$ from $0^{\circ}$ to $360^{\circ}$. [9 marks] b) Use the diagram provided below to answer the following questions. i. Calculate the length of $|P R|$, correct to the nearest whole number. [4 marks] ii. show that $\angle \mathrm{PSR}=90^{\circ}$ [5 marks] c) Determine whether or not the ordered triple $(8,6,9)$ is a Pythagorean triple? [2 marks]