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平行四边形\(ABCD\)中，\(E\)，\(F\)分别为\(AD\)，\(DC\)的中点，\(BE\)与\(AF\)相交于点O，记\(\overrightarrow {AB} = {\rm{a}}\)，\(\overrightarrow {AD} = {\rm{b}}\)．
若\(\overrightarrow {AO} = \lambda \overrightarrow {AF} \)，\(\overrightarrow {BO} = \mu \overrightarrow {BE} \)，求实数\(\lambda \)和\(\mu \)的值．
参考答案：实数\(\lambda \)的值为\(\frac{2}{5}\)，实数的值\(\mu \)为\(\frac{4}{5}\)
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