Do Self$-$Test Exercise $19("$Determine the value, true or false, $...")$ on p$.131$ of Savitch $($Section $3\mathrm{.}2).$

Do Self$-$Test Exercise $24("$What is the output produced by $...")$ on p$.45$ of Savitch $($Section $1\mathrm{.}3$ String$).$

How would you change the code for Self$-$Test Exercise $24$ on p$.45$ of Savitch so the word "sometimes" is appended to the output?

Do any one of the CodingBat String$-1$Links to an external site. exercises $($basic string problems$).($you may type in the code online as part of your solution process.$)$