I have mini project about Expression Evaluator Topics Involved: Stacks, Binary Trees Stage 1: Object-Oriented Design and Analysis 1. Requirement Analysis: . Scope: Evaluating mathematical expressions. . Key Entities: Expression, Opera and Stack , Operator Tree. 2. Designing Classes and Relationships : . Expression: Stores the mathematical expression. . Opera and Stack: A stack to manage operands during evaluation. . Operator Tree: Binary tree for operators and operands. 3. Defining Data Structures: . Use stacks for operand management. . Binary trees to parse and evaluate expressions. 4. System Interaction: . User inputs an expression; the system evaluates and returns the result. example : attached pdf