The current population of a city is 11,02,500. If it has been increasing at the rate of 5% per annum, what was its population 2 yeas ago?

Consider the following sentences :

(i) I woke up from sleep.

(ii) I woked up from sleep

(iii) I was woken up from sleep

(iv) I was wokened up from sleep.

Which of the above sentences are grammatically correct?