SECTION A: How can efficiency of labour be improved in an economy? SECTION B: When will an increase in national income indicate an improvement in the standard of living for a country?

First, let's complete the previous question that was cut off: Question 30: Step 1: Calculate the change in income ( Y). Assuming the question was: "If the marginal propensity to consume (MPC) is 0.75 and autonomous investment increases by 6,750, what is the change in national income?" First, calculate the multiplier (k). k = (1)/(1 - MPC) k = (1)/(1 - 0.75) = (1)/(0.25) = 4 Step 2: Calculate the change in national income. Y = k × I Y = 4 × 6,750 Y = 27,000 The change in national income is $27,00 ✂️ _That answer was long and got cut off. Reply continue and I'll finish it._