Question $2(16$ Points$)$: Consider the following mathematical function:

${?}_c^{n}R=\frac{\text{f}\text{a}\text{c}\text{t}\text{o}\text{r}\text{i}\text{a}\text{l}(n)}{\text{f}\text{a}\text{c}\text{t}\text{o}\text{r}\text{i}\text{a}\text{l}(c)**factorial(n-c)},$ where

factorial $(n)=1**2**3**cdots**n$

For example, let's assume, $n=8,$ and $c=6.$ Then,

${?}_6^{8}R=\frac{\text{f}\text{a}\text{c}\text{t}\text{o}\text{r}\text{i}\text{a}\text{l}(8)}{\text{f}\text{a}\text{c}\text{t}\text{o}\text{r}\text{i}\text{a}\text{l}(6)**\text{f}\text{a}\text{c}\text{t}\text{o}\text{r}\text{i}\text{a}\text{l}(2)}=\frac{1**2**3**4**5**6**7**8}{1**2**3**4**5**6**1**2}=\frac{7**8}{1**2}=28$

Now, write a python program that takes $n$ and $c$ as input and calculate the value of ${?}_c^{n}R.$ Note that, both $n$ and $c$ are integer, and $n$ is greater than c$.$ You must writing a method which will calculate the factorial value for nominator and denominator.