I need help...

We will have the following form

y = Asin (Bx + C ) + D

A = the amplitude =  2

The period =  1 / frequency  =  1 / (1/ [4pi] ) =  =   4pi

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

C = phase shift  =  there is none....so.....C = 0

D = the shift up/down

Because the midline of the normal sine function is y = 0.....then the midline y = 2 shifts this up 2 units....so...D = 2

So.....the function is    

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

Here is the graph :

https://www.desmos.com/calculator/bmcanvqjfx

Second one  .....using the same form as the first one

A = the amplitude = 4

B =  2pi / period  =  2pi / 12  =   pi / 6

C =  no phase shift =  0

D =  shift up/down = 1

The function is

y = 4 sin [ (pi / 6) x ]  + 1

Here's the graph :

https://www.desmos.com/calculator/laevedr8oc