create a Recursion Class that will implement the following recursive algorithms:

$$ Implement a recursive algorithm to compute the integer part of the base$-$two logarithm of n using only addition and integer division as described in problem C$-5\mathrm{.}11$ on page $221$ of the textbook.

$$ Implement a recursive algorithm to compute the product of two positive integers, m and n$,$ using only addition and subtraction as described in problem C$-5\mathrm{.}13$ on page $221$ of the textbook.

$$ Implement a recursive method with calling signature find$($path$,$ filename$)$ that reports all entries of the file system rooted at the given path having the given filename as described in problem P$-5\mathrm{.}27$ on page $223$ of the textbook.