$.$ Suppose Host x wants to send a large file to Host Y$.$ The path from Host x to Host Y has our links, of rates R$\_(1)=300$kbps$,$R$\_(2)=4$Mbps$,$R$\_(3)=2$Mbps and R$\_(4)=150$kbps i$.$ Assuming no other traffic in the network, what is the throughput forthe file transfer? ii$.$ Suppose the file is $12$ million bytes. Dividing the file size by the throughput, roughly how long will it take to transfier the file to Host Y $?$ iii. Assuming R$\_(2)$ is reduced to $400$kbps and file size is $2-$ million bytes, calculate the throughput and time taken for the file transfer