$[1$pts$]$ A method named openFile$()$ that takes as the input parameter a file name of type String. This method will then

try to open the file using try$\{\}$ catch$\{\}$ and return a file directive of type Scanner. This file directive is null if there is

any errors occurred when the file is not found.The method definition is

public static Scanner openFile$($String filename$)\{...\}$

For example, with the file name $$input$.$txt$$ the method will try to open the file $$input$.$txt$$ for reading and return a

Scanner file directive to that file.