18. Define and explain each of the following key terms/concepts of a Spreadsheet: What is a Excel? 19. a. define and explain a cell. b. define and explain a cell reference 20. a. define and explain a worksheet. b. Explain how you will copy and/or move worksheets 21. a. define and explain a workbook. B. New workbooks contain how many sheets by default? 22. a. Define and explain a formula in Excel. b. Explain the formula bar. What displays here? 23. Define and explain a function in Excel 24. Differentiate between absolute (ex. Cell SBS6) and relative (ex. Cell B6) cell references. 25. In MS Excel, what actions are required to edit cell contents directly in a cell? 26. In Excel how do you select an entire row or column? 27. Explain Logical operators. And what is a statistical function? 28. In Excel, a cell can contain what types of data'? 29. What a range reference? Explain with some examples. 30. What is an Adjacent Range? 31. Describe what dates are. 32, what are the reason(s) why ###### are displayed in a cell instead of a value? Explain! 33. A blinking border around a range indicates what? 34. a. The first character that you type in a cell t represent a formula or a math's expressionis b. Write 3 examples of a math expression or formula in Excel. 35. Explain what happens when you copy and paste a formula