Question: What is the primary key and how do you put this in 1st Normal Form, 2nd Normal Form, and 3rd Normal Form? Please explain. Thank

What is the primary key and how do you put this in 1st Normal Form, 2nd Normal Form, and 3rd Normal Form? Please explain.
Thank you
\begin{tabular}{|l|l|l|l|l|l|c|l|} \hline InvNum & ProNum & SaleDate & ProdDesc & VendCode & VendName & NumSold & ProdPrice \\ \hline 110100 & EL1234 & 12/28/22 & Cell phone & E2050 & TracFone & 1 & 199.99 \\ \hline 110101 & FD2345 & 12/28/22 & Bread & F0032 & Baker's & 2 & 2.47 \\ \hline 110102 & CL3456 & 12/28/22 & Bleach & C0007 & Dow Chem & 1 & 1.99 \\ \hline 110103 & HH4567 & 12/28/22 & Tissue paper & H1212 & Whipple & 4 & 3.20 \\ \hline 110104 & FD2345 & 12/29/22 & Bread & F0032 & Bakers & 1 & 2.47 \\ \hline 110105 & FD4321 & 12/29/22 & cereal & F0057 & Post & 1 & 2.99 \\ \hline 110106 & HH4567 & 12/29/22 & Tissue paper & H1212 & Whipple & 8 & 6.40 \\ \hline \end{tabular}
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