How can unmerge all Cells at a row of table?

I have a table as bellow image:

I want unmerge all cells at row 3 of table ex:

I had try to get Row 3 , but It only has a Cell.

var oDoc=app.documents[0];
var oTable=oDoc.textFrames[0].tables[0];
var oRow3=oTable.rows[2];
var iCellNum=oRow3.cells.length;

How can get all Cells merged to Row 3 to unmerge them?