Write the following SQL queries for a Hospital system on MSAccess or MySQL$.$ Each student is expected to write the queries that answer the questions below. The SQL codes that can build the database are given below.Find the names of person having at least $2$ stays during last $2$ months.

$2.$ Find the person paying most during last $3$ months $($today$\text{'}$s date is the latest date entered into the database$).$

$3.$ Find the most preferable room type?

$4.$ Which Clinic has more than $2$ doctors?

$5.$ What is the total revenue for the last month?

$6.$ Which Doctors are not available on May $15$th $2019$ at $10$ am$?$

$7.$ What is the average age of patients whose blood type A$+?$