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Given the following UML diagram for the Calculator class, and the implementation of the add() and sub() methods, implement two JUnit test cases to test the functionality of the add() and sub() methods. Use the appropriate JUnit annotations and include multiple test cases to verify different scenarios for each method. public static int add(int a, int b) {   return a + b; }public static int sub(int a, int b) {   return a – b; }

The ________ artery nourishes the walls of the left atrium.

What was the most common subject matter for early Daguerreotypes?

The NumberFormatException is an example of a checked exception.

What unusual substance was used in the Autochrome color process?

Describe the relationship between photography and painting beginning in the late 19th century. Be specific and include examples.

What lead to the rise of travel photography?  Who wrote an article about the concept of photography as a form of “transport” and what was meant by that? What were some of the challenges 19th century travel photographers faced?

What was Daguerre’s profession before he became involved with photography?

Once it was announced, why was photography such an instant success, particularly as a portrait medium? Discuss portrait methods available before photography, which photographic methods were used for portraits, and some of the major early portrait photography practitioners.

Once it was announced, why was photography such an instant success, particularly as a portrait medium? Discuss portrait methods available before photography, the two main photographic process used for portraits in the 1800’s, and name two of the major portrait photographers/studios (in the 1800’s).