\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
For \(f:x\mapsto 3\cdot 2^x\), find in simplest form:
  1. \(f(0)=\)
  2. \(f(2)=\)
  3. \(f(-1)=\)