Instructions: Solve each expression using the correct order of operations (PEMDAS: Parentheses, Exponents, Multiplication and Division - left to right, Addition and Subtraction - left to right). Simplify fractions and mixed numbers where necessary. Show your work.
1. Calculate: \(2 + 3 \cdot (4 - 1)^2 \div 5 = ?\)
2. Simplify: \(\frac{5}{8} + \frac{3}{4} \cdot \frac{1}{2} = ?\)
3. Evaluate: \(3^2 \cdot 2 - 4 + \frac{1}{2} \div 2 = ?\)