I need help with price of demand.

Question 3. A certain commodity satisfies the demand equation relating price, p, and quantity demanded, q,q =1000/p^2 .
If the price of this commodity is lowered, will the revenue generated by its sales increase?

4. The price p (in dollars) and the demand q for a product are related by p^2 + 2q^2 = 1100.
If the current price per unit is $30, will revenue increase or decrease if the price is raised slightly?