$1-$Write a Python Program to find the Smallest of three numbers using conditional Statement and functions.

$2-$Write a Python program to calculate $S=\frac{2^1}{3^2}+\frac{4^3}{5^4}+\frac{6^5}{7^6}+$cdots$+\frac{n^{n-1}}{(n+1{)}^n}$

$3-$Write a Python program to convert Kilometers to Miles.

$4-$Write a Python example to find Compound Interest.

$5-$Write a Python program to find the Area and Volume of a Sphere.

$6-$Write a Python program to find the Factorial using recursive function.