PLZ help with the following: Consider the following relations:  Suppliers (Snumber, sname, address)         Parts (Pnumber, pname, color)                                       Catalog (Snumber, Pnumber, Qty)                              Find the suppliers names who supply the part number 7 with quantity greater than 50.     Select one: a. πSname(σPnumber=7 (Parts)) b. πSname(σPnumber=7 and Qty>50 (Catalog))  c. None of the above d. πsname(σPnumber=7 and Qty>50  (Catalog)  (Parts))

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A: Dear learner, hope you are doing well, I will try my best to answer this question. Thank you!