Polygon abcd is defined by the points a(-5, 1), b(-4, 3), c(-2, 7) and d(-1, 2). if the polygon rotates 90° counterclockwise to create polygon a′b′c′d′, what are the coordinates of c′ ?

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample