5. (a) Show that 2x + 7 is a factor of 2x3 + 5x2 − 11x − 14. Hence, factorise the given expression completely, using the factor theorem.   6. (b) The median of the following observations 11, 12, 14, 18, (x + 4), 30, 32, 35, 41 arranged in ascending order is 24. Find x.   7. (c) In the above figure, ∠BAD = 65°, ∠ABD = 70° and ∠BDC = 45°. Find :- (i) ∠BCD   8. (ii) ∠ADB Hence show that AC is a diameter. (Type in the answers separated by commas. Leave no spaces around the commas.)