RPA to pick based on 3 blank excel cells


I have a sample excel duty roaster. The objective is to have RPA pick an engineer who has at least 3 “available” cells. Pls guide me how i can build Uipath to achieve this.

Duty.xlsx (10.6 KB)

Its possible to make out if available and unavailable is written in the cells, it is not possible if its empty or colored.