\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Consider the sequence \((u_n) = (100, 95, 90, 85, \dots)\), where the first term is \(u_1\). Find:
  1. \(u_1=\)
  2. \(u_2=\)
  3. \(u_3=\)
  4. \(S_1=\)
  5. \(S_2=\)
  6. \(S_3=\)