please help me with part a,b,c, and d

Transaction costs You would like to purchase one Class A share of Berkshire Hathaway through your Scottrade brokerage account. Scottrade charges a $5 commission for online trades. You log into your account, check the real-time quotes for Berkshire Hathaway (you see a bid price of $262,850 and an ask price of $263,810) and submit your order. a. What is the current bidlask spread for Berkshire Hathaway Class A shares? b. If Scottrade routes your buy order to the NYSE, where Berkshire Hathaway is listed, what's the potential minimum your total transaction costs will be? c. If , instead, Scotrade routes your buy order to NASDAQ, where Berkshire Hathaway is not listed, what's the potential maximum your total transaction costs will be? d. Regardless of how your trade is executed, based on the bidlask spread, what is the market value of your trade? a. The current bidlask spread for Berkshire Hathaway Class A shares is $(Round to the nearest dollar.)