Assume the availability of an existing class, icalculator, that models an integer arithmetic calculator and contains: an instance variable currentvalue that stores the current int value of the calculatora getter method for the above instance variablemethods add, sub, mul, and diveach method in icalculator receives an int argument and applies its operation to currentvalue and returns the new value of currentvalue. so, if currentvalue has the value 8 and sub(6) is invoked then currentvalue ends up with the value 2, and 2 is returned. so, you are to write the definition of a subclass, icalculator1, based on icalculator. the class icalculator1 has one additional method, sign, that receives no arguments, and doesn't modify currentvalue. instead, it simply returns 1, 0 or -1 depending on the whether currentvalue is positive, zero, or negative respectively.

What important technology has done the most to allow a businesses a chance to compete with larger international companies

4. a1. vince owns a television repair shop that is insured undera commercial package policy. the policy includes thebuilding and personal property coverage form and thecauses-of-loss broad form. the declarations page indicatesthat coverage applies to both the building and the namedinsured's business property. explain whether or not thefollowing losses would be covered under his policy.a. a fire occurs on the premises, and the building isbadly damaged.b. a burglar steals some money and securities from anunlocked safe.c. a business computer is damaged by vandals whobreak into the shop after business hours.d. a tornado touches down near the store. several tel-evision sets of customers in the shop for repair aredamaged in the storm.til

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.