Step by step explanations please, any graphs , formulas , definitions

Q4. Consider the following demand curve: q = 10 - I) Where q measures the quantity and p measures the price. Find the point elasticity of demand with respect to price at p = 2. Q10. Indicate whether the following statements are true, false, or uncertain. i. The price of a good increases by 10%, and you spend a larger fraction of your income on it. This means that the good is a Giffen good. ii. Goods 1 and 2 are substitutes, and goods 2 and 3 are substitutes. This means that goods 1 and 3 are substitutes