We will rework the drainage system from the Y to the kitchen sink and install a new drain stub up. After the cabinets are reinstalled, we will complete the connection to the drainage system and add a floor drain for the ice maker. Additionally, we will shut off the water supply to the home, replace the kitchen sink water lines, and install tee fittings for the ice maker and dishwasher. This comprehensive approach ensures an efficient and modernized kitchen plumbing system.