Tracks of business trips of salespersons in a sales office. The office has a number of salespersons working on a number of teams. It is desired to keep track of each trip for each salesperson. Every salesperson has an EID, name, gender, mobile, and salary. Each team has an ID$,$ a unique name, a leader $($one of the team salespersons$).$ Every trip starts from a city to another city, has a departure and return dates, expenses amount, a number of contracts and their amounts. map the er into reletional schema