SQL query help, please use the attributes name as it used on my db.

1.Write a query that answers this question: Which customer has more than 2 completed orders? Return the following:

-Name of the Customer

-the total number of orders for each customer

Use a DERIVED table in your logic

2.Write a query to illustrate the use of a subquery as a source in a JOIN

Return each service that has a promotion

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Thank you in advance!

\begin{tabular}{|l|l|} \hline \multicolumn{2}{|c|}{ PAYMENT } \\ \hline PK & PaymentID \\ \hline & PaymentType \\ AccountNum \\ RoutingNum \\ CreditCardNum \\ CCExpDate \\ CCSecurityNum \\ Status \\ CreatedDate \\ \hline \end{tabular} \begin{tabular}{|l|l|} \hline \multicolumn{2}{|c|}{ PROMO_SVC } \\ \hline PK & PromeServID \\ \hline FK & ServicelD \\ FK & PromoCode \\ & CreatedDate \\ \hline \end{tabular} \begin{tabular}{|l|l|} \hline \multicolumn{2}{|c|}{ PROMOTION } \\ \hline PK & PromoCode \\ \hline & PromoDescriptionStartDateEndDateStatus \\ \hline \end{tabular} \begin{tabular}{|l|l|} \hline \multicolumn{2}{|c|}{ INVOICE } \\ \hline PK & InvoicelD \\ \hline FK & CustomerID \\ FK & OrderID \\ FK & EmployeelD \\ & SubTotal \\ TaxAmount \\ TotalAmount \\ InvoiceDate \\ \hline \end{tabular} \begin{tabular}{|l|l|} \hline \multicolumn{2}{|c|}{ CATEGORY_SVC } \\ \hline PK & CategoryID \\ \hline & CategoryName \\ \hline \end{tabular} CellPhone Title DateOfHire