Based on the following Stem-and-leaf of 40 bats, how many bats weighed 23.2 grams? Stem-and -leaf of bats N = 40 Leaf Unit = 0.10 4 21 0011 8 21 3333 13 21 45555 14 21 6 14 21 16 22 01 17 22 3 (4) 22 4455 19 22 6 18 22 888 15 23 01 13 23 2233 9 23 455 6 23 67 4 23 9 3 24 001 three O two O five O one