How do I do this?

[st32-22]

I know it's connected with circles probably in picture below, but I don't get which ones exactly. I always get lost in little details.

This is what I have so far:

[st32-22]

Also the 3rd picture this part confuses me 

[cadffm]

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edited

@st32-22  schrieb:

 I don't get which ones exactly. I always get lost in little details.

You can easily see which one is bigger than the other ones

and you have 3 "Circles"

1. One with diam10, one with diam15 and one with diam 20

What do you mean is bigger than dima 15 = dima20

What do you mean is smaller then dima 15 = diam 10

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[cadffm]

>>"Also the 3rd picture this part confuses me "

Which part?

[paullimapa]

looks like you only drew this in 2D. You should draw it in 3D using solids. Then you can in Layout create vports with one being a 3d View:

[st32-22]

Oh, I am supposed to do it like that in auto cad just draw and later make it in inventor like 3d model. 

[paullimapa]

Easier to now draw in Inventor and bring the 3d view back into AutoCAD