Help needed for using a decoder

Hi all, I was wondering if anyone could help with the following
question.

For the function, F(A, B, C, D) = (0, 2, 4, 5, 8, 10, 12, 13) give the
minimised sum-of-products solution.
Devise a realisation that uses a decoder with active-low outputs and
one other gate.

I have a solution of (NOT B AND NOT D) OR (B AND NOT C) but I dont know
how to use a decoder in this situation. Can I use a 3-line-to-8-line
one for this? Any suggestions?

Also very quickly, why are general purpose encoders not very useful?

Thank you

strictly_mk

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