Dear tutor, thanks for your help. Could you help solve the attached questions and briefly explain it to me

6. Taking the index of export prices. import prices, volume of exports, and productivity in the export sector in a developing nation to be equal to 100 in 1980, in 2010 what would be: a. The commodity terms of trade of this nation if the index of its export prices rises by 10 percent but the index of its import prices rises by 20 percent? in. This nation's income terms of trade if the index of export volume grows to 130 by 2010'? c. This nation's single factoral terms of trade if its productivity index in the export sectorl rises to 140 by 2010