Can you please help me with this question before 1:30 pm today?

Can you please help me with this question before 1:30 pm today?

 David purchases two goods: bananas (x) and tea (y). Her indifference curves are smooth

and convex. Suppose the price of tea decreases. On a graph, illustrate the income and

substitution effects of the price change on Diana’s optimal consumption bundle for each

of the following cases:

(a) Tea is an inferior good for Diana, but not a Giffen good.

(b) Diana’s income elasticity of demand for tea is zero.

(c) Bananas and tea are both normal goods.