TechEdu Pte Ltd provides education services to local and foreign students. Sometimes, the need arises to send a message to a student. First, an Education Administrator (EA) finds the student contact details. If a mobile phone number is available, an SMS is sent to the student. If an email address available, the message is also sent by email. Regardless of whether the message is sent by SMS or email or both, the Student returns a call to the EA. Construct an extended Event-Driven Process Chain (eEPC) for the above description.