We consider data from the 1980 US Census on married women aged 21-35 with two or more children. The data contains the following variables: morekids factor. Does the mother have more than 2 children? genderl factor indicating gender of first child. gender2 factor indicating gender of second child. age age of mother at census. afam factor. Is the mother African-American? hispanic factor. Is the mother Hispanic? other factor. Is the mother's ethnicity neither African-American nor Hispanic, nor Caucasian? work number of weeks in which the mother worked in 1979 For the analysis below, we create a dummy variable which takes 1 if individual has three children or more and 0 otherwise and use it as the dependent variable. Also, we use the rest of variables in the data set as regressors. (a) We estimate a regression tree and obtain the below plot. Explain two numbers at the far-left node and explain chracteristics of the node (no more than 40 words). work >= 49 0.23 11% 0.31 15% age = 7 hispanic no 0.54 1% 0.37 16% age= 49 0.23 11% 0.31 15% age = 7 hispanic no 0.54 1% 0.37 16% age