What comprises the seven ages of man or stages in life of man according to the poem

Shakespeare's monologue includes the seven ages of man or the seven stages in life of man. Stage 1 is infancy. This refers to when a man is born. Stage 2 is schoolboy, where formal education starts. Stage 3 is teenager where he becomes interested with girls. Stage 4 is young man where he is a soldier. Stage 5 is middle aged where he is wise and experienced. Stage 6 is old man where he is weak physically and mentally. And the last stage, the 7th is dotage and death.