'Train the brain ' with the logical question is extremely tough!

From just a few clues, can you find solutions to logical questions that are "extremely difficult" below with your reasoning ability!

Question

Question 1: Who is left-handed?

Try to deduce in this picture, which man is most likely to be left-handed!

Question 2: Who is a liar?

A detective came to the restaurant to have a meal when he encountered an argument between a drunken man and a waiter. Here is a dialogue between two characters:

1. Waiter: 'But he called barbecue before that!'.
2. The drunk guest: 'I have never ordered a meat dish, I just came here to sip some wine because I am saving money.'
3. The waiter: 'He was really drunk and could not remember what he had called for 2 hours ago'.

Listening to this, the detective immediately said, "Hey waitress, you know very well that the guest cannot call this dish, please accept the error".

According to you, why does the detective know that the waiter is a liar?

Question 3: Tracing the bandits!

'I just arrived in this city and when I was walking, a man came in front of me, a hand holding a threatening gun, the other hand quickly took my watch!' - a tourist came to the police station report- 'He has mustache and a blue pants .'.

Thanks to the security camera system arranged throughout the streets, police arrested 5 suspects: Lou, Lo, La, Lee and Liu.

Through the picture of the moment the tourist was intimidated, along with the appearance of these 5 suspects, can you deduce who is really the culprit?

Answer

Question 1: Who is left-handed?

Waiters are lefties. Because when working, this waiter will use his right hand (unconventional hand) to hold the tray. Meanwhile, the left hand is the dominant hand which is more versatile and will be used to serve food or pour drinks for diners.

Question 2: Who is a liar?

According to the clock on the wall, when the controversy happened, it was 6:30 PM. The waiter said the guest who had ordered the barbecue two hours ago was about 4 hours 15 minutes. However, the notice board clearly stated that the restaurant only serves dishes until 3 pm. So drunk guests certainly could not ordered earlier.

Question 3: Tracing the bandits!

Lou is not a bandit because his hat has zigzag pattern and not vertical stripes like the camera recorded. Meanwhile, La has a downward mustache, not prancing up like a bandit. Lo and Lee could not be perpetrators because they had only one good hand so they could not hold the gun and take the watch. Therefore, it can be concluded that Liu is the object we are searching for.