Answer:

1.Yes I can see 3 people in the picture

2.They are busy studying

3.Let's all study hard

4.Long ago

5.Because I base on the quality of the picture and it really looks like an old picture

6.All of us are busy studying, all of us are sacrificing our lives and time just to achieve our dreams in life so don't get tired of stidying because all of your sacrifices will remain and be lesson for you once you achieved your goal

7.I guess we all should work harder on our classes/modules starting from today!

Hope it helps:)