Please choose the correct ending to complete the given sentence: Welding: He shows a new product called nova, which is an electrode for cleaning dirty aluminum. He shows two aluminum plates that are joined together for demonstration purposes. he

Ending1: uses the adjustable grill to remove the aluminum. Ending2: introduces an additional product called 45 volt to stretch his tire mechanism. Ending3: takes the nova rod and shows how he can weld the two pieces together. Ending4: shows a different color metal and a list of aluminum plate lists.

Answer format: ending1/ending2/ending3/ending4