Please help me answer these multi choice questions :)

Question 19 One year before maturity, the price of a bond with a principal amount of $1,000 and a coupon rate of 5% paid annually fell to $981. The one-year interest rate: C Remained at 5% C Rose to 7.0% Rose to 6.0% C Rose to 8.5%Question 22 In an open economy, a decrease in national saving the equilibrium domestic real interest rate and the quantity of net capital inflows and the quantity of domestic investment increases; increases; increases decreases; decreases; decreases increases; decreases; decreases C increases; increases; decreasesQuestion 23 Use the following figure to answer the question: PAE Y = PAE Expenditure | ine (r= 1%) Expenditure I ine (! = 3%) Expenditure | ine (r = 5%) 450 3 000 5 000 7 000 Output Y Based on the diagram, if potential output equals 5000 and the real interest rate is 5%, then there is gap and the Reserve Bank must the real interest rate so that output will equal potential output. an expansionary; increase a contractionary; decrease a contractionary; increase no output; not changeTight monetary policy _ interest rates, which . the demand for a currency and the fundamental value of the exchange rate. C increases; decreases; increases increases; increases; increases C decreases; decreases; decreases C increases; increases; decreasesQuestion 25 Holding all else constant, an increase in Australian real GDP will _ the supply of dollars in the foreign exchange market and _ the equilibrium Japanese yen/Australian dollar exchange rate. not change; not change decrease; increase increase; increase increase; decreaseQuestion 29 If firms decide to increase their amount of short-term borrowing, this will: Increase the supply of 90-day bills, causing the 90-day bill rate to fall. C Increase the supply of 90-day bills, causing the price to fall. C Decrease the supply of 90-day bills, causing the price to rise. C Decrease the supply of 90-day bills, causing the 90-day bill rate to fall