Using a copy of your friend's software is unethical and illegal

The erase member function of class vector cannot:

a. Specify an element to be removed from the vector. b. Specify a value to be removed from the vector. c. Specify a range of elements to be removed from the vector. d. Be called by member function clear.

What is the term given to the difference between the received signal level and the signal level required by the radio to assure there are no errors?

A. free space path loss B. system operating margin C. voltage standing wave ration D. link budget