Please Help me with this question. Needs to be correct

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Yoku is putting on sunscreen. he uses 2\text{ ml}2 ml to cover 50\text{ cm}^250 cm 2 of his skin. he wants to know how many milliliters of sunscreen (c)(c) he needs to cover 325\text{ cm}^2325 cm 2 of his skin. how many milliliters of sunscreen does yoku need to cover 325 \text{ cm}^2325 cm 2 of his skin?

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?