anyone can help me with this code: i really don't know the formulas of the different communication link used in this problem and how will i used a java api for the progress bar. please help me. simulate the downloading of file with the following parameters -- file size in KB or MB. The simulation must display all together to compare the speed among the different communication link (DSL, Modem, T1, E1). The bandwidth must be specified on every communication link. Correct formula must be applied by showing the computation.