Consider servers of new organization distributed accross the world and supported by a network of satellites around the earth. the transmission between a server ans satellite is $360$ms $($one way$)$ and the transmission delay bettween any $2$ satellites in the netwrok may not exceed $400$ms $($one way$).$ the response time of a server or a satellite is $5$ms$.$ Assue that servers and satellites are kept synchronized every $24$ hrs$.$ Any local clock may skew by at most $0\mathrm{.}5$ms$/$hour

a$/$ when serve A sends a message to server B$,$ after what time should A time out

b$)$ what are the possibe causes of failure when A sends essage to B

c$)$ would you model this as a serail assembly or parallel assembly $?$