Questions and discussion for this lecture live here. Fire away by hitting Reply below 
Have to say, this one really makes you think! Glad to say I got it… after a lot of cursing and figuring out which way was up. But now I need a breather! xD
I need to do more like this. Holy cow that was difficult!
Good job on this course!
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Well done David! You’re in a good place having reached this point!
Seán