4 years ago a corporation issues 20 year bonds with $1000 face balue. Bonds pay coupon of 60$ semiannually. They sell for $920. Firm has issues new bonds with maturity of 10 years a par value of 1000 and pay coupon or $40 semiannually. Both bond have same yield, how many bonds must be issued to raise $5 mil. please show how to do this with a refulae calculator