Describe technological and political (legislative) factors of changes in child labor between 1600 and 1900.

Economic historian Jane Humphries collected historical data on the distribution of age at entry into labour force from about 600 biographies of working men who lived between 1600 and 1900. The histogram of the cumulative distribution is as attached in the first doc,Please answer: How did the median age at entry into labour force change across the four periods, delimited by Humphries (provide your numerical estimates, as read from the graph)? What were the technological and political (or legislative) factors behind this development?Notice: Pls read the full question which is in the picture called “The Question!!” And the document called “Children at work in the British Indev” is very important because it includes many points about technological and legislative factors!