PLEASE HELP!!! Vectors Pure 3!!!

[allysaleemally]

Hi, I am stuck with question 9 (iii) in Paper 33 O/N 2011. Its vectors. Could any PLEASEEEE HELP MEEEEEE?????????? THANKS A MILLLIONNNNNNN!

QP: http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w11_qp_33.pdf
Marksheet: http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w11_ms_33.pdf

Thanks again