For each of the descriptions below, perform the follow- ing tasks: i. identify the degree and cardinalities of the relationship. ii. express the relationships in each description graphically with an e-r diagram. a. a book is identified by its isbn number, and it has a title, a price, and a date of publication. it is published by a publisher, which has its own id number and a name. each book has exactly one publisher, but one publisher typically publishes multiple books over time. b. a book (see 2a) is written by one or multiple authors. each author is identified by an author number and has a name and date of birth. each author has either one or multiple books; in addition, occasionally data are needed regarding prospective authors who have not yet published any books.

A911 dispatcher is the sole sender of messages to all police officers. while on patrol, officers communicate with the dispatcher who, in turn, relays messages to other officers. the officers do not communicate directly with one another. this illustrates a network.

How can you tell if someone sent you a text message to your email instead of a email

Jason, samantha, ravi, sheila, and ankit are preparing for an upcoming marathon. each day of the week, they run a certain number of miles and write them into a notebook. at the end of the week, they would like to know the number of miles run each day, the total miles for the week, and average miles run each day. write a program to them analyze their data. your program must contain parallel arrays: an array to store the names of the runners and a two-dimensional array of five rows and seven columns to store the number of miles run by each runner each day. furthermore, your program must contain at least the following functions: a function to read and store the runners’ names and the numbers of miles run each day; a function to find the total miles run by each runner and the average number of miles run each day; and a function to output the results. (you may assume that the input data is stored in a file and each line of data is in the following form: runnername milesday1 milesday2 milesday3 milesday4 milesday5 milesday6 milesday7.)