Method x1() has code that calls method x2(). Method x2() has the following header.

public int x2() throws IOException

Which of the following statements is true?

1) Method x2(), in addition to the throws declaration, is required to also handle the exception.
2) Method x1() is not required to do anything since method x2() already declares that it throws IOException.
3) Method x1() must either catch IOException or declare that it, too, throws IOException or a superclass of IOException.
4) If an IOException is generated in the code of method x2(), the exception will be passed back to the caller as an int value.

I believe it is 3.

Formatting rows and columns is similar to cell formatting. in an openoffice calc spreadsheet, you can format data entered into rows and columns with the of the rows and columns options. you can insert rows and columns into, or delete rows and columns from, a spreadsheet. use the insert or delete rows and columns option on the insert tab. alternatively, select the row or column where you want new rows or columns to appear, right-click, and select insert only row or only column options. you can hide or show rows and columns in a spreadsheet. use the hide or show option on the format tab. for example, to hide a row, first select the row, then choose the insert tab, then select the row option, and then select hide. alternatively, you can select the row or columns, right-click, and select the hide or show option. you can adjust the height of rows and width of columns. select row and then select the height option on the format tab. similarly, select column, then select the width option on the format tab. alternatively, you can hold the mouse on the row and column divider, and drag the double arrow to the position. you can also use the autofit option on the table tab to resize rows and columns.