What style of Mexican music is this called? What is the opening tempo? Can you tell what the meter is? Since there are no drums, which instrument provides the beat?

Directions:

Watch the video link below and write one complete paragraph 200-250 words responding to the following questions.

What style of Mexican music is this called?
What is the opening tempo?
Can you tell what the meter is?
Since there are no drums, which instrument provides the beat?
After a while there is a cadence and then a new tempo and meter. When does that occur?
Can you tell what the meter is in the new section?
What is the different between the vocals in the first and second section.