Please help.....

On the first one " The function is a reflection of its parent function over the x axis".....I'm not sure why this matters

But, anyway

We have the form

y = Asin (Bx)  + D

A = the amplitude = 3

B =   2pi / period =  2pi / 4pi   =   1/2

D = the shift up = 2

So....the function is :

y = 3 sin [ (1/2)x] + 2

Here is the graph :  https://www.desmos.com/calculator/ql4fe7s4za

Second one

A =  the amplitude =   difference between highest and lowest position / 2  =  6 / 2   =  3

The period is 20 

B =   2pi / period  =    2pi / 20  =   pi / 10

The function is  

y = 3 sin ( pi * x / 10  )

Here is the graph : https://www.desmos.com/calculator/wmogvbaslp