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:D Clicky Clicky :D

I am unable to determine the co-ord of C... well I get a value but it doesnt look right, I get which does not seem to fit the value of C. All the other values seem to be perfect execpt for C. Here are my workings.

14.1)

Which can also be taken from

Either the book is incorrect or I am. The book has been incorrect a few times so ye :/