Please answer using Excel! Thank you in advanced!!

2. The gross national product (GNP) represents the sum of consumption purchases of goods and services, government purchases of goods and services, and gross private investment (which is the increase in inventories plus buildings constructed and equipment acquired). Assume the GNP is increasing at the rate of 2% per year, and that the national debt is increasing at a rate proportional to the GNP. (a) Construct a system for two ordinary differential equations modeling the GNP and national debt. (b) Solve the system in part (a), assuming the GNP is Mo and the national debt is No at year 0