Please choose the correct ending to complete the given sentence: Using the rowing machine: A man exercise on a rowing machine pulling a handle and moving forward and backward. then

Ending1: , he moves a rod to the side and pushes the rod to bend. Ending2: , the man squats to lift the bar with his right hand, then he lift the bar with his left hand on the flat surface and stops. Ending3: , the man increases the resistance of the machine and continue exercising. Ending4: , the man hold the more handle as is increases the weight, then the man pushes the handle dumb on the next line of curling cars.

Answer format: ending1/ending2/ending3/ending4