Question 1173712
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It seems to me,  that this problem is for  7year -  8years child,  who is not familiar with trigonometry functions.


In any case,  they want to get the answers,  but do not ask to write the functions.



Actually,  this problem has two purposes:


                - to check if the reader can read and understand simple geometric facts;

                - to combine his  (or her)  minimal knowledge to get the correct answers.



Following to this style,  I'd answer these questions as follows:



<pre>
    - The amplitude is the same as the radius of the wheel.


    - The midline is at the height of the axis, i,e  2 + 35/2 = 2 + 17.5 = 19.5 meters.


    - The period is given: it is the time of one full rotation/revolution, i.e. 6 minutes.


    - The height of a passenger over the ground in three minutes is 2 + 35 = 37 meters.
</pre>

Solved.