Calculate the total delay for a $5MB$ file considering a network with following properties: $[5]$

$-$the bandwidth of the network is $0\mathrm{.}5Gbps$

$-$distance between the sender and the receiver is $20,000km.$ Assume that light travels at $2\mathrm{.}5{10}^8\frac{m}{s}.$

$-$between the sender and the receiver there are $3$ routers. Each of them takes $0\mathrm{.}5ms$ for queueing and $1ms$ for processing.

$-$there is no queueing delay at the two ends, however each end device takes $1$ms for processing.