Explain the meaning of the idiomatic expressions in the following sentences.

1. "Don't count your chickens before they hatch."

This expression means not to make plans based on something that has not yet happened or is uncertain. It is a warning against being overly optimistic or assuming a positive outcome before it is guaranteed.

2. "Bite the bullet and just do it."

This expression means to face a difficult or unpleasant situation head-on and deal with it, even if it requires courage or sacrifice. It is often used to encourage someone to take action despite their reservations or fears.

3. "The ball is in your court now."

This expression means that it is now someone else's turn to make a decision or take action. It implies that the responsibility or control has shifted to the other person, and it is up to them to respond or make a move.

Sorry, but I need the sentences with the idiomatic expressions to provide accurate explanations. Please provide the sentences so I can assist you.