<p>4. Consider the following table and FDs</p><p>PRODUCT(pid,pname,price,pmfr,c-o,discount,type)</p><p>pid → pname,type,pmfr</p><p>pmfr → c-o,discount</p><p>type → price</p><p>pmfr,pname → pid</p><p>(a) Give all the keys of PRODUCT.</p><p>(b) Decompose PRODUCT into 3NF relations. Make sure thedecomposition is