if you apply in the country where your nationality is located, you don't need to fill in this item. If you don't apply in the country where your nationality is located, fill in the time when you entered that country at the first time and the time when your visa expired at the second time.

As for the second question, you should directly fill in your study experience, the employer should fill in the name of the school, and both the city and the country should fill in the information about the location of the school. Fill in the first column in the school where you are studying now, and fill in the second and third columns in the school where you have graduated.