Question

give the answer of 5th and 6.
Easy language

Answer 1

++++++Mail merge is a process to create personalized letters and pre-addressed envelopes or mailing labels for mass mailings from a form letter. ... When the mail merge process is run, the word processing system creates an output document for each row in the database, using the fixed text exactly as it appears.

# In easy language it a process by which we will mail automatically addition of names and addresses from a database to letters and envelopes in order to facilitate sending mail, especially advertising, to many addresses.

Answer
On the Mailings tab, click Start Mail Merge, and then click Step by Step Mail Merge Wizard.

Select document type

In the Mail Merge task pane, click Letters. This will allow you to send letters to a group of people and personalize the results of the letter that each person receives.
Click Next: Starting document.

Select the starting document

Click one of the following options: 
Use the current document: Use the currently open document as your main document.
Start from a template: Select one of the ready-to-use mail merge templates.
Start from existing document: Open an existing document to use as your mail merge main document.In the 
Mail Merge task pane, click 
Next: Select recipients.

Select recipients

When you open or create a data source by using the Mail Merge Wizard, you are telling Word to use a specific set of variable information for your merge. Use one of the following methods to attach the main document to the data source.

Method 1: Use an existing data source

To use an existing data source, follow these steps: 
In the Mail Merge task pane, click Use an existing list.In the Use an existing list section, clickBrowse.In the Select Data Source dialog box, select the file that contains the variable information that you want to use, and then click Open.

Note If the data source is not listed in the list of files, select the appropriate drive and folder. If necessary, select the appropriate option in the All Data Sources list. Select the file, and then click Open.

Word displays the Mail Merge Recipientsdialog box.
You can sort and edit your data if you want to.Click OK to return to the main document.
Save the main document. 

When you save the main document at this point, you are also saving the data source and attaching the data source to the main document.Type the name that you want to give to your main document, and then click Save.