7-Segment Display Need Help Immediately!! Please!!!

I can't figure out how I build this at all. I need so much help please! If anyone has any idea it would be great. I can't figure out how to make a keyboard on here or how to use the encoder and decoder correctly. Please help me.
Thank you much appreciated.
Attachments:
Project_3.doc ‏113 KB

Hi,
I didn't look through the entire assignment but I suggest you look up the datasheet for the 74147 and 7447.
Tien P.
National Instruments

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