Hi everyone!
So I just started an online course in AutoCad and have been given this task. I am having a bit of trouble figuring out how to do this. Maybe some of you could help telling me what to do here?

The task:

Describe how to draw an arc with a center point of 120.60, a radius of 15.75 mm and an arc angle of 150 degrees. The starting angle is 90 degrees. Draw the arc. How is the arc positioned if the starting angle is 0 degrees? Also draw this arc. Indicate on the drawings what the starting angle is.

Greatly appreciate all replies!