Problem:
Question- Write relational algebra queries for each of the following:
1) Get a list of all the different destination cities where the employess have taken trips.
2) Find all the employee information for employees who work in Department 10.
3) Get complete trip records (but not their associated expenses) for all trips with departure dates after January 1 of the current year.
4) Find the names of all employees who have departed on trips from London.
5) Find the SSN of all employees who have any single expense item of more than $1000 for any trip.
6) Find the names of all employees who have any expense item with value "Entertainment".
7) Find the destination cities of all trips taken by employees who have the job title of "Consultant".
Please show your all work step by step to find the names of all employees who have departed on trips from London.