Hi could you please help me with that task, thank you

BURGERNOMICS IS BASED ON THE THEORY OF PURCHASING POWER PARITY - THE NOTION THAT A DOLLAR SHOULD BUY THE SAME AMOUNT IN ALL COUNTRIES. COMPARE THE PURCHASING POWER OF THE COUNTRIES ON THE WORKSHEET AND HOW THE EXCHANGE RATE AND THE PRICE OF A BIG MAC VARY. USE GOOGLE SHEETS TO PERFORM YOUR ANALYSIS (ATTACHED) THEN, ANSWER THE FOLLOWING QUESTIONS (IN SHEETS):

1. WHICH TWO COUNTRIES HAVE THE MOST EXPENSIVE BURGERS?
2. WHICH TWO COUNTRIES HAVE THE CHEAPEST BURGERS?
3. STATE TWO REASONS WHY YOU THINK THE PRICE OF BIG MAC'S VARIES AROUND THE WORLD ?
4. RESEARCH THE LATEST ON-LINE RESULTS USING THE BIG MAC INDEX AND REPORT THE TWO COUNTRIES WITH THE MOST EXPENSIVE AND THE CHEAPEST BURGERS?

The sheet and the article for question 4:

https://docs.google.com/spreadsheets/d/10Q3DCyBbtCQQJYkj6P4wQ7uJA0N77PtqriI85zySHQI/edit?usp=sharing

https://www.economist.com/news/2020/07/15/the-big-mac-index