Largest Hydroelectric Plants. According to Wikipedia, the world’s five largest hydroelectric plants, based on installed capacity, are as shown in the following table. Capacities are in megawatts.

Rank Name Country Capacity 1 Three Gorges Dam China 22,500 2 Itaipu Dam Brazil/Paraguay 14,000 3 Guri Venezuela 10,200 4 Tucuru´ı Brazil 8,370 5 Grand Coulee United States 6,809

a. What type of data is given in the first column of the table?

b. What type of data is given in the fourth column?

c. What type of data is given in the third column?