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(a) Find

_ _ _ _ _ __ (i) CF in terms of a

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ (ii) AD in terms of c

The lines OD and AF intersect at the point X Given that

OX = λOD and AX = μAF, where λ and μ are scalars,

(b) find the value of λ and the value of μ

Given that OX : XD = n:1

(c) find the value of n

Given also that I a l = 12 cm and l c I = 12.5 cm,

(d) find the area, in cm2, of quadrilateral XDBF .