Explanation

Write down the use of the following shortcut keys:

Cntrl + shift + A is used to change the selected text to all capital letter

Shift + F2 is used to create or edit a cell comment in Microsoft Excel.

Crtl + F4 is used to close the active tab or window

Cntrl + F12 is used to Open a file.

Shift + F12  is used to  Save the open document.

Crtl + W is used to Close the currently open document