=IF(G2="Sergu Sen-Kam";"06:00";IF(G2="Sergu Jum";"04:00";IF(G2="sergu sabtu";"05:00";"")

Sergu Jum
sergu sabtu

06:00:00	0,25
05:00:00	0,208333333
04:00:00	0,166666667