You said that you would reply 4 Hearts to the 4 Club asking bid, meaning that you have 1 Ace, which you do, and 5 Spades to the 5 Club asking for Kings bid, meaning you have 2 Kings. This is correct.
Here are the hands for the slam in progress. Sort them out and play them out to see if you can make 6 Hearts. If you need help, click here.
The final lesson is again on slam bidding - with a slight variation on Gerber. Go to Lesson 20. Ladder Bidding of Slams.