(a) Solve the inequality: 5x-3 = ≥ ${15x-11}/{2}$

(1b) Given t = (^-1 ₃) and K = (² _-4), find 2t+k

(1c) The sides of a triangle are in the ratio 6 : 8 : 10. If the perimeter of the triangle is 288 cm, find the:
(i) longest side
(ii) Shortest side
(iii) difference between the longest and the shortest sides.