Consider the following database schema:

Companies $($comp$\_$Id$,$ Comp$\_$name, address, dep$\_$number$)$

Employees $($Number$,$ Name, Age, Salary$)$

Departments $($dep$\_$number, dep$\_$name$)$

Supervision $($Head$,$ Emp$)$

$1.$ Query: Find the registration numbers of the supervisors of the employees earning more than $100$

Jordanian dinars. $($In Relational Algebra$)-$

$2.$ Query: Find the registration numbers of the supervisors of the employees earning more than $100$

Jordanian dinars. $($ In Domain Relational Calculus$).$