This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to do dips
Find an assisted pull-up/dip machine at the gym.
Most gyms with extensive weight sections will have this piece of equipment. It has a platform where you place your knees or feet and weights that can be adjusted to counterbalance your body weight.

Options are:
(1). Make sure that you can easily lift any heavy tool or weight on the machine. Decide whether or not you are bringing your regular or stand-up pull-ups, spins, and dips..
(2). Ask for assistance from a gym employee or personal trainer the first time you use this machine. If you are a first time weight lifter, assistance will reduce the likelihood of injury..
(3). Stations can be purchased at workshops around town or online. Pre-made dips come with a regulation wheel that can be opened and removed to be rotated..
(4). When you sit in a squat position to do a dip, keep your shoulders back and keep your head elevated at all times while you do the dip. An assisted pull-up that features platforms to support hands, feet and arms is ideal for infants under the age of five and 8 weeks old..
The answer is:
(2).