Refer to the Salza Technology Corporation

A$.$ Using average balance sheet account data, calculate the $($a$)$ current ratio, $($b$)$ quick ratio, $($c$)$ total$-$debt$-$to$-$total$-$assets ratio, and $($d$)$ the interest coverage ratio for $2019.$

B$.$ Repeat the ratio calculations requested in Part A separately for $2018$ and $2019$ using year$-$end balance sheet account data. What changes, if any, have occurred in terms of liquidity and financial leverage?