please answer this question short answer is ok thank you

Use the diagram depicting National Saving and Investment demand below to answer the following questions. NS 10 Real Interest Rate (%) iA :35 :40 45 :50:55 D Quantity of Financial Capital ($ billions) a) What is the equilibrium interest rate? (1 mark) b) If consumption were to reduce what impact would this have on the above diagram - what line(s) would change, and how, and what impact would that have on interest rate? (3 Marks) c) After the change occurs from "part b" above what impact would this have on growth rate? (1 Mark)