Assume you request a webpage consisting of one html document and five images. The html file size is 30 Kbytes, all images have the same size of (6*10) Kbytes, the download rate is 50 Mbps, and RTT is 100 ms. Assume a DNS query takes 30ms and that the DNS query needs to happen only once regardless of the number of parallel connections. How long does it take to obtain the whole webpage under the following conditions?

1. Nonpersistent HTTP

2. Nonpersistent HTTP with two parallel connections

3. Nonpersistent HTTP with four parallel connections

4. Persistent HTTP with one connection