The area under rice in 50 districts is given below in acres. Show the distribution by frequency curve making a frequency table of 7 classes.

140 160 140 220 110 130 160 170 210 200

240 150 155 130 255 210 170 190 235 240

160 150 180 170 240 160 240 170 215 236

239 170 190 190 170 230 256 135 170 140

255 200 240 140 170 160 246 140 130 260.