1. (6 pts) In this exercise, you will write expressions that refer to some of the objects in the Excel object model, which is shown in the following figure. Application Workbooks (Workbook) Worksheets (Worksheet) a. How many collections are shown in the above figure? b. For each of these collections, what type of objects are the members of this collection. For example, if the collection is people, the type of its member would be person? c. What expression can be used to refer to the running Application, i.e. Microsoft Excel? d. What expression can be used to refer to the Workbooks collection? e. What expression can be used to refer to the Workbook object whose name is "My Workbook.xlsm"? f. What expression can be used to refer to the second Worksheet object contained in the Workbook object whose name is My Workbook.xlsm