Note: This is a single question so please answer all parts of the questions; I would greatly appreciate it, thank you very much!

In the input field below, write an SQL query that lists the machine id of the machines that have had no unscheduled maintenance in 2019. In the input field below, write an SQL query that lists each employee name, the machine id of the machines on which they have performed maintenance, and the total hours of maintenance they performed. In the input field below, write an SQL query that lists the id and purchase date of all machines and the total maintenance cost (hourly cost for that machine multiplied by the number of hours the maintenance took) by machine for scheduled maintenance