The base height of the dingdong plant is 10 cm. three pair genes contribute to the height of the plant and each dominant allele contributed 4 cm. to height. If your cross a 10 cm. Plant \[({{a}_{1}}\text{ }{{a}_{1}}\text{ }{{a}_{2}}\text{ }{{a}_{2}}\,{{a}_{3}}\text{ }{{a}_{3}}\text{ }recessive)\] with a 34 cm. plant, how many phenotypic classes will there be in the\[{{F}_{2}}\]?