Write a program that implements an appointment book. There are two types of events that can be recorded in an appointment book: a personal appointment, and a meeting. Both types of events consist of a contact (the name and telephone number of a person), and the start time of the event. Events always begin on the hour, and last for one hour. An appointment book is a collection of events. Events can be added to the appointment book, and the list of events for a given date can be displayed

Dereck works for long hours on his computer.  he frequently experiences physical strain by the end of the day because he does not follow an important rule of ergonomics with respect to the use of keyboards.  which of the following actions of dereck could lead to physical strain? a.  placing the keyboard exactly in front of him while typingb.  keeping hands and wrists straight while typingc.  using wrist pads throughout the dayd.  pounding at the keys on the keyboard while typinge.  resting his hands on the keyboard when he is not typing