$2\mathrm{.}1$ Use the COUNT function to calculate the number of MLB teams in $1990($range G$4$:G$33).$

$2\mathrm{.}2$ Use the COUNTA function to calculate the number of MLB teams $($use range G$4$:G$33)).$

$2\mathrm{.}3$ Use the SUM function to calculate the total amount of salaries paid in $1990.$