Write a function to display students exam results. Following requirements must be fulfilled: 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) iii. 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) Appreciate students who secured top 3 positions (function appreciationmessage) iv. name