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In a sequence diagram, where are objects that already existed when the sequence begins placed?

(4.6 points for the correct answer. 1 bonus point if you have correctly answered five of Questions 1 through 5 and Question 7.) A programmer writes 480 lines of computer code in 11 days. Then there must have at least 1 day when the programmer wrote 43 or more lines of code.

(4.6 points for the correct answer. 1 bonus point if you have correctly answered five of Questions 1 through 5 and Question 7.) A programmer writes 600 lines of computer code in 13 days. Then there must have at least 1 day when the programmer wrote 45 or more lines of code.

Fill in the blanks in the following proof by contradiction that       

Is simple or complex usually preferred in UI design?

In this question, we will prove directly the statement :        

The diagram below shows part of a sequence for calling the constructor for a new Car object. What, if anything, is incorrect about this interaction?

Consider the diagram above. The Bank Account System is designed for a bank to keep track of the transactions for each customer account. Each account has one or more transactions. Each transaction is related to a single account. Accounts also have one or more customers.  New transactions can be added. New customers can be added to an account and a customer can be removed from an account. When a customer is removed from an account, they are still part of the Bank Account System . A banker wants to add a current customer to an existing account. A portion of the system includes the following classes. Notice that no methods are listed yet. In which class does the AddAccount() method belong?

Consider the diagram above. The Bank Account System is designed for a bank to keep track of the transactions for each customer account. Each account has one or more transactions. Each transaction is related to a single account. Accounts also have one or more customers.  New transactions can be added. New customers can be added to an account and a customer can be removed from an account. When a customer is removed from an account, they are still part of the Bank Account System. When a transaction happens, the system needs to add the transaction. A portion of the system includes the following classes. Notice that no methods are listed yet. In which class does the AddTransaction() method belong?

Consider the diagram above. The Trail Listing System is designed for people who want to learn about the trails in the area. New trails can be added, and existing trails can be removed. An employee at the trail listing company wants to add a new employee to the system. A portion of the system includes the following classes. Notice that no methods are listed yet. In which class does the AddEmployee() method belong?