I'm confused on how to do these

3. Explain why over the long run a labor demand curve (straight line) with a slope of -1 and a labor supply curve (straight line) with a +1 slope creates a problem for Congress to justify a minimum wage 10% above the market equilibrium rate. Show your work. 4. Keynes and the Classical economists disagreed over the role of the interest rate in the economy. Explain. Why did Keynes believe that the economy was not alway "self adjusting" in the short run? 5. Keynes believed that an increase in savings could lead to a recession or depression. Explain