Reference Adjustment Calculus - Please solve with clear procedure, thank you

Question 2: Linear Parametric Least-Squares Adjustment [50 points] Determine the final adjusted area of the isosceles trapezoid represented in the figure below. Assume that the distance observations contained in Table 1 are independent. d b - a Table 1 Observation Distance (m) Standard Deviation (m) a 25.682 0.030 b 38.421 0.020 C 64.049 0.040 d 12.796 0.010 e 29.273 0.035 f 29.313 0.055 Determine the following: 1. Number of observations 2. Number of independent parameters 3. Number of degrees of freedom 4. All necessary observation equations 5. Design matrix 6. Weight matrix 7. Observation vector 8. Vector of adjusted parameters (include units) 9. Vector of residuals (include units) 10. "Adjusted" observations (include units) 11. Final area of the trapezoid and its associated uncertainty Hints: Compute the "adjusted" observations before computing the final area of the trapezoid The two triangles are of equal dimensions