please solve as soon as possible. solve this 3 problem in c++ code..please answer this 3 question.

1. Implement merge sort algorthm. (Submit olc++/javal py file). 2. Implement finding the minimum of an array by using divide and conquer technique. (Submit clc++/javal py file). 3. Calculate the running time of problem 2 (write down the calculation on a paper sheet, scan and upload it as pdf)