Write a regular expression to describe each of the following programming language constructs:

Any sequence of tabs and blanks $($sometimes called white space$).$ Use $\backslash$t for tab, and require at

least one space or tab.

Comments in the C programming language. In this case we only care about the "old school" style C commands that: $/*$ look like this $*/.$

String constants $($without escape characters$).$ This includes all strings that begin with doublequotes, end with $($a separate$)$ double$-$quotes, and do not otherwise contain double$-$quotes. An

example would be to match $$abcd$($with double$-$quotes$).$