20. Federal prisons. The table below shows the number of federal prison inmates serving sentences for various types of offenses in 1990 and 1998. Counts given are in thousands of prisoners. Year 1990 1998 Violent (murder, robbery, etc.) 10 13 Property (burglary, fraud, etc.) 8 9 Type of Offense Drugs 30 63 Prenatal Care Level of Public order (immigration, weapons, etc.) 9 22 Other 2 a) Write a brief description of these data, in the proper context, highlighting any important changes you see in the prison population. Copyright Material - To be used as Chapt b) What percent of all twin births were preterm? c) Among the mothers who did not receive adequate medical care, what percent of the twin births were preterm? d) Create an appropriate graph comparing the outcomes of these pregnancies by the level of medical care the 25 mother received. e) Write a few sentences describing the association be- tween these two variables