Suppose that x bits of user data are to be transmitted over a k-hop path in a packetswitched network as a series of packets, each containing p data bits and h header bits, with x > > p h. The bit rate of the lines is b bps and the propagation delay is negligible. What value of p minimizes the total delay?

Some of the first computer games were created in the early 1970s by college students experimenting after hours to see what the were capable of doing.

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File account.java (see previous exercise) contains a definition for a simple bank account class with methods to withdraw, deposit, get the balance and account number, and return a string representation. note that the constructor for this class creates a random account number. save this class to your directory and study it to see how it works. then write the following additional code: 1. suppose the bank wants to keep track of how many accounts exist. a. declare a private static integer variable numaccounts to hold this value. like all instance and static variables, it will be initialized (to 0, since it’s an int) automatically. b. add code to the constructor to increment this variable every time an account is created. c. add a static method getnumaccounts that returns the total number of accounts. think about why this method should be static - its information is not related to any particular account. d. file testaccounts1.java contains a simple program that creates the specified number of bank accounts then uses the getnumaccounts method to find how many accounts were created. save it to your directory, then use it to test your modified account class.