A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Select J4:K4.
On the Home tab of the ribbon, click Conditional Formatting > New Rule...
Select 'Use a formula to determine which cells to format'.
Enter the formula
=AND($I4<>",$J4="",$K4="")
The $ characters before the column letters are essential: they make the column references absolute.
Click Format...
Activate the Fill tab.
Select orange.
Click OK twice.