The image contains mathematical questions involving systems of linear equations and differentiation problems. I'll break down the questions visible in the image for better clarity:

1. Question 2(b): Solve the following system of linear equations using matrices and Cramer's Rule: $2x - y + z = 4$ $4x + 2y - 3z = 5$ $3x - 4y - z = 8$

2. Question 2(i): Find $f(x), f'(x),$ and $f''(x)$ if: $f(x) = \ln(x^2 + 4x + 3)$

3. Question 2(ii): Given: $f(x) = \frac{15}{x^2 + 25x + 3}$ Find $f'(x)$.

Would you like to start with solving the system of linear equations using Cramer's Rule or proceed with the differentiation problems? Let me know your preference!