dear expert i humble request to you plz plz plz solve this 4. 5 .6 question i humble request to you... plz solve these step by step i will be very thankfull to you..

4. Pakistan bank issues a 10 year treasury bond at 12% coupon with the par value of 1000 Rupees. If the market yield increases shortly afterwards, what happens to the following parameters: a) coupon rate b) price c) current yield d) yield to maturity. 5. Why is a call provision advantages to a bond issuer? When will the issuer initiate a refunding call? Why? 6. ABC corporation has issued 12 percent annual coupon 1000 Rupees par value bonds maturing in 10 years. What should be the current price of this bond if the interest rate is 15 percent