please explain the questions bellow:

1: Find the website of the World Bank (https://data.worldbank.org/indicator/FP.CPI.TOTL)

and find data on the CPI. What trend in the Index and is by how much has the Index risen

over the past few years?

2: In 2018 the nominal rate of interest was 7 percent. The rate of inflation was 2.7 percent. How much was the real interest rate?

3: Which do you think has a greater effect on the CPI: a 10% increase in the price of

chicken or a 10% increase in the price of chocolate ? Why?