There are too many questions here . I will do 1 and 2 and you will try the rest . Ok ?
For (1) , always refer to the original sin graph , . Note that For all sin graph here , it will start from 0 and end at 360 .
One cycle here is . 1/3 of the cycle would be so your graph should stop at . Then label this as . Notice that the amplitude is 5.
For (2) , sin 2x : this will go 2 rounds . -4 : shift the graph downwards for 4 .