Implement the Caesar's cipher (a shift cipher where the shift is 3) using Python. Your program(s) should work on the iLab environment. You cannot use existing crypto libraries. You should submit two files: "en. py" and "de. py". Each of them takes a string as input. "en. py" implements the encryption algorithm and "de. py" implements the decryption algorithm.

Assume the existence of a bankaccount class. define a derived class, savingsaccount that contains two instance variables: the first a double, named interestrate, and the second an integer named interesttype. the value of the interesttype variable can be 1 for simple interest and 2 for compound interest. there is also a constructor that accepts two parameters: a double that is used to initialize the interestrate variable, and a string that you may assume will contain either "simple", or "compound", and which should be used to initialize the interesttype variable appropriately. there should also be a pair of functions getinterestrate and getinteresttype that return the values of the corresponding data members (as double and int respectively).

Are special combinations of keys that tell a computer to perform a command. keypads multi-keys combinations shortcuts

Martha is designing a single-player game. her manager suggests that she plan the design to incorporate future modifications. which principle of game design relates to planning for future modifications?