For each of the following predefi ned character classes, give the defi nition and specify the equivalent range: [:lower:], [:upper:], [:alpha:], [:digit:] and [:alnum:]. For example, [:lower:]...

For each of the following predefi ned character classes, give the defi nition and specify the equivalent range: [:lower:], [:upper:], [:alpha:], [:digit:] and [:alnum:]. For example, [:lower:] represents all the lowercase numbers; the equivalent range is a-z.