Question 1 (7 marks) a) Explain what it means for the last survivor status 50: 60 to remain active for at least 10 years (1 mark) b) Calculate: i) So tPxylxydt (2 marks) ii) So Pxylx+tdt (2 marks) iii) So PryHx+tat (2 marks) Question 2 (7 marks) Given that qx = 0.05, qy = 0.10, qx+1 = 0.06 and qy+1 = 0.12. Deaths are uniformly distributed over each year of age. Calculate: a) 0.754xy (4 marks) b) 0.54x+1:y+1