SOLUTION STEPS (Set 7):
  1. Find the step: subtract two consecutive terms (1.4 - 1.2 = 0.2).
  2. Keep adding 0.2: 1.6 + 0.2 = 1.8, then 1.8 + 0.2 = 2.
  3. The missing numbers are 1.8 and 2.