Consider the database scheme given in Question No 2.i- Calculate the q

1.	Consider the database scheme given in Question No 2.i- Calculate the query cost of the given two relational queries.ii- Write SQL query for both relational queries.a) PNAME (((sCITY!= ‘Rawat’(Customer))⋉CID(Order))⋈OID(soquantity!=3 (Invoice)))b) PPrice(sP.PID=I.PID^O.OID=I.OID(((sPrice>30(Product))x Invoice))x(soid!=3 (Order)))
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Consider the database scheme given in Question No 2.i- Calculate the query cost of the given two relational queries.ii- Write SQL query for both relational queries.a) PNAME (((sCITY!= ‘Rawat’(Customer))⋉CID(Order))⋈OID(soquantity!=3 (Invoice)))b) PPrice(sP.PID=I.PID^O.OID=I.OID(((sPrice>30(Product))x Invoice))x(soid!=3 (Order)))

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it's not CLEAR to me