Who's in charge for finding a tenant for a room in house (In California)?

So i live in a house with 4 other people. We all live in a house, and each of us has a lease for agreeing to pay for each of our own rent amount. One of the roommates moved out last month, and the landlord told us to try and find someone to move into the house with us. We haven't found anyone and my landlord... show more So i live in a house with 4 other people. We all live in a house, and each of us has a lease for agreeing to pay for each of our own rent amount.

One of the roommates moved out last month, and the landlord told us to try and find someone to move into the house with us. We haven't found anyone and my landlord told us that we are in charge of paying for that room.

Is it our responsibility to find someone to rent out the room or the landlords?

Does anyone know any laws or anything related to our situation?
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