$1.$ A is a statically$-$scoped language. Assume a new variant of A$,$ called A$\text{'},$ that uses the exact same syntax as A but is dynamically$-$scoped. Provide an input file that would be valid in both A or A$\text{'},$ but prints a different result based on which scoping system is used. Show what the output would be either under scheme.

$2.$ Provide an input file that would be valid in A$\text{'},$ but not in A$.$

$3.$ Explain the difference between an SLR and an LR$(0)$ parser. Provide an example grammar that is SLR$-$parseable but not LR$(0)$ parseable.