Premise: The following are stand-alone SQL questions. If you are unable to answer a question, please document your approach and proposed next steps. For each of the below, please show the exact results that you expect based on your SQL query.

Question:

1. Is this a valid SQL statement?

SELECT CUSTOMERS.GENDER, count(DISTINCT CUSTOMERS.CUSTOMER_ID), count(*), sum(DISTINCT CUSTOMERS.CUSTOMER_ID)

FROM CUSTOMERS

GROUP BY CUSTOMERS.GENDER;

2. Is this a valid SQL statement?

SELECT CUSTOMERS.GENDER, count(DISTINCT CUSTOMERS. CUSTOMER_ID), count(*), count(DISTINCT CUSTOMERS.AGE)

FROM CUSTOMERS

GROUP BY CUSTOMERS.GENDER;