The following data is district-level data used in the journal article "The Effects of Spending on T Pass Rates: Evidence from Michigan" (2005), Journal of Public Economics 89, 821-839. It is school-level daga on school districts in Michigan for the years 19921998. A description o variables used in your problems are below: math4math7exppy92y98lfoundlenrol%satisfactory,4thgrademath%satisfactory,7thgrademathexpenditureperpupil=1ifyear==1992=1ifyear==1998log(found),wherefoundisfoundationgrant,$:1995-98log(enrol),whereenrolisschoolenrollment Summary Statistics of variables used: summarize math4 math7 expp y92 y98 lenrol lfound a. From the data descriptions and the summary statistics data, what type of variables are the variables y92 and y98? b. From the data descriptions, what type of variables are lfound and lenrol? The following data is district-level data used in the journal article "The Effects of Spending on T Pass Rates: Evidence from Michigan" (2005), Journal of Public Economics 89, 821-839. It is school-level daga on school districts in Michigan for the years 19921998. A description o variables used in your problems are below: math4math7exppy92y98lfoundlenrol%satisfactory,4thgrademath%satisfactory,7thgrademathexpenditureperpupil=1ifyear==1992=1ifyear==1998log(found),wherefoundisfoundationgrant,$:1995-98log(enrol),whereenrolisschoolenrollment Summary Statistics of variables used: summarize math4 math7 expp y92 y98 lenrol lfound a. From the data descriptions and the summary statistics data, what type of variables are the variables y92 and y98? b. From the data descriptions, what type of variables are lfound and lenrol