Let p be the set of all kings and queens regnant of england, and let p0 be the set of all kings and queens regnant of england except elizabeth ii. let s represent the successor function; for example, s(william i) = william ii. note that s is a function from p0 to p.
is this 1-1 and onto?

Three friends went on a road trip from phoenix, az, to san diego, ca. mark drove 50 percent of the distance. jason drove 1/8 of the distance. andy drove the remainder of the distance. 1. andy thinks he drove 1/4 of the distance from phoenix, az, to san diego, ca. is andy correct? 2. the distance from phoenix, az, to san diego, ca, is 360 miles. how many miles did each person drive? 3. solve the problem. what is the answer in total?