Answer 4, 5, 6, 9,10 with relevant example. All the following statements are incorrect. Why is it incorrect? If needed please use graph or formulas or calculations

(iv) The demand for most products varies directly with changes in income, and these products are categorized as complementary goods. (v) During economic recession, the economy is characterised by a macroeconomic condition where economic output is low, labor market is tight, and ination environment which is high. (vi) Crowding out effects are the results of expansionary monetary policy. It results in total investment to increase. (vii) In economics, opportunity cost is best dened as how much money and time it takes to consume something. For example, the opportunity cost of going back to pursue your study in the MBA program is the amount of tuition fee and the years it take to nish studying. (viii) The denition for those who are \"not in the labour force\" includes those who are unemployed and could not nd a job. (ix) The multiplier effect of investment on the economy will be bigger if the marginal propensity to consume is smaller (give example and show your calculations). (x) A zero unemployment rate is possible if the economy is able to provide all the jobs required in the economy