Frequency polygon: The following frequency distribution presents the batting averages of professional baseball players who had 300 or more plate appearances during a recent season. Batting Average Frequency 0.180-0. 199 2 0200-0219 14 0220-0239 36 0240-0259 56 0260-0279 57 0280-0299 53 0300-0319 30 0320-0339 14 0340-03559 4 (a) Find the midpoints for the classes. Round the answers to three decimal places. Class 0.180-0.199 0200-0219 0220-0239 0240-0259 0260-0279 02800299 0300-0319 0.320-0.339 0340-0359 Midpoint II] I Frequency 2 14 36 56 57 53 30 14