I think they are "어떻게", "어떡하죠?" and "어떡하지?" respectively.
"어떻게" simply means "how" like "how do I spell that?(=어떻게 쓰죠?)".
(The base form is "어떻다")
On the other hand, both "어떡하죠?" and "어떡하지?" can be used in a situation where you are in trouble and you don't know what to do.
Both can be "what should I do?" or "what am I supposed to do?", but "어떡하죠?" is used to ask somebody what I am supposed to do? while "어떡하지?" is more like mumbling to yourself.
The base form of both is "어떡하다",and it's the contraction of "어떡하게 하다".
\^o^/