Consider firms selling three goods: one firm sells a good with an income elasticity of demand less than zero, one firm sells a good with an income elasticity of demand greater than zero but less than one, and one firms sells a good with an income elasticity of demand greater than one.The COVID-19 pandemic has spread all over the world infecting millions of people and bringing economic activity to a near-standstill (World Bank, 2020). In these kind of situation, which firm is likely to see its sales decline most? Which firm is likely to see its sales increase the most? Explain.