$4.$ On October $3,2007,$ the $10$ year treasury note has a bid price of $98$:$18,$ and an ask price of $98$:$28.$ The treasury note has a face value of $$10,000,$ and a coupon rate of $6\%$ made semiannually. The treasury note matures on October $2,2012.$ What are the bid price, ask price, and bid$-$ask spread, respectively? What is the ask yield$-$to$-$maturity?