$(2$ points$)$ Suppose within your Web browser you click on a link to obtain a Web

page. The IP address for the associated URL has been cached in your local host, so a

DNS lookup is not necessary to obtain the IP address. Suppose that the Web page

associated with the link contains a small amount of HTML text, and it references to $8$

very small objects on the same server. Neglect transmission times and let RTT ${?}_w$

denote the RTT between the local host and the Web server containing the objects.

How much time $($in terms of RTT ${?}_w)$ elapses

a$.$ if non$-$persistent HTTP is used with no parallel TCP connections?

b$.$ if persistent HTTP is used and requests for referenced objects are sent out

back$-$to$-$back without waiting for responses for previous requests?