The meaning of 1. just like this:Design a 8-to-1 line multiplexer using:
1. a 3-to-8 line decoder, 8 2-AND gates and 1 OR gate.
Thanks.Assuming this is correct, is the OP supposed to submit this as their answer, along with the Drawn by Scott Wang notation? That would only seem fair, that you get the credit for doing the OP's work for them, doesn't it? Or were you intending for the OP to submit your work as their own?
There's a reason why the guidelines for this forum strongly discourage simply providing answers and, instead, guiding the posters toward the solution
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An 8:1 multiplixer has 8 data inputs. There are then three select lines to choose which of those 8 data inputs is fed to the single data output.