Calculate the price of a K5, 000 bond quoted at 85 percent

1. Calculate the price of a K5, 000 bond quoted at 85 percent.                    
2. Calculate the current yield of a bond whose current price is K4, 500 and has a coupon of K350.                                                                                          
3. The price of a stock is expected to be K1, 200 in one year's time. There is a 45% probability that the stock will fall to K990 and that it will rise to a particular price. Calculate the price rise in the event of an increase in the price of the stock.