I need help with my government and I can't figure this out can someone help me?!?

Question

How does a territory become a state? I've got to rank 6 steps in order in which they were taken in process of granting statehood to Alaska...

15) __ The president proclaimed Alaska a state

16) __ Congress passed statehood legislation

17) __ The people of Alaska voted approval of the proposed state constitution

18) __ The people of Alaska petitioned Congress for admission to statehood

19) __ The ratified state constitution of Alaska was submitted to Congress

20) __ Congress passed an enabling act authorizing Alaska to frame a state constitution

Answer 1

15) 6

16) 5

17) 3

18) 1

19) 4

20) 2