You can calculate the market supply: Q1+Q2=2500+1250=3750

Now,you know the price of the market is 10,and the supply Q=3750.

and unit price variation will bring about market supply change, then,you can calculate the change according to the ratio of the two kinds of suppliers, but you must remember, all the mumber of the same kind of suppliers will change together.

You can work out the questions.