Use Tuple Relational Calculus (TRC) to answer the same queries

This is the ER Diagram

(a) List the names, phones and join times of all swimmers joining CLYSTMS after 1/1/2015 LNameFName Phone l joinTime Khan Billy 832-116-2992 1 2015-12-12 | Khan | Nina 832-116-29921 2016-05-12 I Johnson1 Philipl713-222-1010 1 2015-05-15 I (b) List the names of the swimmers who have Azalea Khan as the primary main caretaker I LName FName I | Khan Bobby Khan Billy I (c) List the names and emails of all other caretakers (not including the main caretaker) of Bobby Khan I LName FName Email Khan I JosephI the JKhan@gmail.com I Khan I Jim theJKhan2@gmail.com I % FR Assistant- [CLYSTMS-sol (1)] File Edit View Insert Mode Window Help LevelHistory -for-. .. "..-Other caretaker-,-.. .. FName by- RescindTime Phone EMai JoinTime ...-...-Main caretakerPhone Comment on. Level V Task in--Comment NumV FName Result Phone V TaskList of on Penaity PenaltyAmt of Event Meet tt etid Title Date StartTime EndTime State ZipCode