re: Homebrewing: Supplies/ Starter Kits

Question:

When do you strain out hop and grain ingrediants?

In my book, my steps are as follows:

4. Add your hot malt extracts and water mixture to fermenter.
5. When temperature is ideally below 75 degrees, measure the specific gravity with your beer hydrometer and then add the yeast.
6. Attach fermentation hose (blow out hose) and after initial fermentation has subsided attach fermentation lock.
7. Ferment for 8 - 14 days.

In step 6 they say, "First sanitize the 3' length of 1 1/4 inch outside diameter clear plastic hose. After having strained out all hop and grain ingredients from your brew, fit the hose into the carboy's opening".

1)Are they telling me to strain my brew before adding it into the glass carboy?
2)Or do they want me to add my extracts and water mixture to the carboy (step 4). Take a measurement (step 5). Then go back and strain out the excess grains, then attach the hose?
3) or does the fermentation hose (blowout hose) strain your grain and hops for you? and should i just proceed with attaching the blowout hose and letting it drain into a jar?

This is the only step of the process i'm unclear on.