I received a call from a customer who reported a leaking faucet in their kitchen sink. I arrived at the customer's house and inspected the faucet. I found that the cartridge inside the faucet handle had worn out and was causing the leak. I removed the old cartridge and replaced it with a new one. I then turned on the water supply and tested the faucet and found that it was no longer leaking. However, I noticed that the sink drain was also clogged. I removed the sink trap and found a build-up of debris. I cleared the debris and reinstalled the sink trap. I then ran water down the drain to confirm that it was flowing smoothly again. I informed the customer about the repairs and demonstrated that the faucet was no longer leaking, and the drain was now unclogged.