(1). Briefly use the following concept to describe the impact of Covid 19 pandemic on: (A). Aggregate demand and aggregate supply of goods and services. (b). Price elasticity of demand for essential products such as pastas. (C). Market failure. (D). Gross domestic product (E). Durable and non durable industrial (F). Labour force participation rate (G) federal budget. (2). Name two variables, other GDP, a government can use to measure the welfare of a nation