1)How long has Duman been living/does he live in Astana? 2)How long has Omar been studying/does he study at school 15? 3)My friend has been looking/looked for a bike for 3 weeks 4)I wrote/have been writing this exercise since 4 o'clock pm.

a)How long has Dmitry been living in Astana ?b)How long has Omar been studying at school №15c)My friends has been looking for a bike for 3 weekd)I have been writing this exersise since 4 o*clock e)I am tired because i have been writing this exersice since 4 o*clock