Сочините пожалуйста по 3 предложения на first conditional и second conditional

1 : We"ll have a barbecue if the weather is fine. I'll cook you something if you haven't eaten. If you're doing your homework when i arrive, i'll be as quiet as a mouse. 2: If it were cheap you would buy the house. If i had a key i would let you inside. If it rained, i would not go there.