Problem $3$:

Using RAPTOR flowchart, design a flowchart that takes from the user a percentage grade and

prints its corresponding letter grade according to the following table.

Design an algorithm that simulates a simple calculator. The user enters two numbers

$($the operands$),$ and an operator $(,,+-*,/).$ Your algorithm should compute the

operation and output the result. Make sure to cover the case of division by zero by

printing an error message.