Write a python program to display students exam results.

Write a function to display students exam results. i. Read the names and marks of at least 5 students, data should be acquired from the user and saved as dictionary (using a function named getdata) ii. Rank the top three students with highest marks (make a function named rankstudents) Give cash rewards. Rs. 5000 for first rank, Rs. 3000 for second rank, Rs. 1000 for third rank. Value cannot be modified (function name should be cashreward) 111. iv. top 3 positions (function name Appreciate students who secured appreciationmessage)