I need help please!!!

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

The architect's side view drawing of a saltbox-style house shows a post that supports the roof ridge. the support post is 8 ft tall. the distance from the front of the house to the support post is less than the distance from the post to the back of the house. how far from the front of the house is the support post positioned?