How do you say good morning Mrs.Young in Korean?

Answer 1

안녕하세요 <name> 씨

(an yong ha se yo <name> shi)

The 'shi' part replaces 'miss' or 'mr'. Depending on Mrs Young's position, it would be different. If she is a teacher, you would say 'an yong ha se yo young son sang nim' (son sang nim means teacher)

Answer 2

You can either say 안녕하세요 (an-nyong-ha-se-yo) or 굿모닝 (goot-mo-ning).