A(n) _____ shows the object classes and relationships involved in a use case. 

MC An algorithm is______ .

a) a series of actions that solve a particular problem. b) an english description of a problem to be solved. c) the process of converting between data types. d) None of the above.

Case-Based Critical Thinking Questions ? Case 3-1 Ellen is a recent college graduate. She has decided to open a T-Shirt business and would like to create budget worksheet using Microsoft Excel 2016. She need to keep track of her expenses and income for the year. ? ? Ellen has entered all of her monthly expenses. She needs to create a formula that will deduct her monthly expenses from her monthly income. Since her monthly income is the same amount each month, she uses a(n)____ to identify the cell containing the income value.

A. relative reference B. absolute reference C. mixed reference D. fixed reference