Should there be an answer of 15 and 16 for the frequency? If so can you help

Defects per 100 Vehicles (alphabetical by brand) Brand Defects Brand Defects Brand Defects Acura 87 Hyundai 106 MINI 131 Audi 111 Infiniti 98 Mitsubishi 140 BMW 113 Jaguar 132 Nissan 111 Buick 114 Jeep 137 Porsche 108 Cadillac 111 Kia 124 Ram 110 Chevrolet 111 Land Rover 171 Scion 114 Chrysler 133 Lexus 92 Subaru 124 Dodge 135 Lincoln 97 Toyota 117 Ford 102 Mazda 114 Volkswagen 121 GMC 138 Mercedes-Benz 86 Volvo 83 Honda 98 Mercury 113 Click here for the Excel Data File (a) Construct a stem-and-leaf plot for the number of defects per 100 vehicles for these 32 b Stem-and-Leaf plot for Weights Stem unit 10 + Leaf unit 1 Frequency Stem Leaf 3 8 367 4 9 27 8 8 3 10 268 11 11 011 1 13 34 447 3 12 14 4 6 13 123578 14 0 15 16 1 17 1 32