Study the following line graph carefully to answer the given questions

Q1. Total number of students in the School Z in the years 1992,1994 and 1997 together?
1. 1670              2. 1950              3. 1590              4. 1580

Q2. What was the approximate average no of students in School Y over all the years together?
1. 500               2. 502              3. 506              4. 508

Q3. What was the difference between the total no of students in all the schools together in 1993 and 1995?
1. 320               2. 350              3. 270              4. 250

Q4. Total no of students in School Y and School Z together in the year 1994 is what % less than the total no of students in School X and School Y in the year 1997?
1. 18.26%               2. 25.67%              3. 32.50%              4. 39.78%

Q5. Number of students in the School Y is what % of the total no of students in all the three schools together in 1993 ?
1. 45%               2. 39%              3. 35%              4. 52%