When checking the engine oil level of a motorcycle using a dipstick, which of the following describes the correct measurement procedure?

1. Warm up the engine, shut it off, wait a few minutes, hold the motorcycle upright on level ground, wipe the dipstick, insert it without screwing it in, and check the level.
2. Measure the oil immediately after a long ride while the engine is running and the motorcycle is on its side stand.
3. Wipe the dipstick, screw it in fully, hold the motorcycle on its side stand, unscrew it, and read the level.
4. Measure the oil while the engine is cold, with the motorcycle leaning on the side stand, inserting the dipstick without wiping it.