Consider the table "Item" given below and give the outputs on the basis of it:

Table: ITEM

(a) SELECT SUM(Price) FROM ITEM;

(b) SELECT AVG(Price) FROM ITEM;

(c) SELECT MIN(Price) FROM ITEM;

(d) SELECT MAX(Price) FROM ITEM;

(e) SELECT COUNT(Price) FROM ITEM;

(f) SELECT DISTINCT Price FROM ITEM;

(g) SELECT COUNT(DISTINCT Price) FROM ITEM;

(h) SELECT Iname, Price*Quantity FROM ITEM;

Define a function. Why are they useful?

Write a command to display the name of the current month.

Write command to print the day of the week of your Birthday in the year 1999.