Define the complete disjunctive normal form

Question

Response to the following problem:

Determine the complete disjunctive normal form of the function f(x₁, x₂, x₃, x₄) defined by the set of decimal indices where it takes the value 1 as f(1) = {0, 1, 4, 6, 7, 10, 15}. Then, define the complete disjunctive normal form for the logic complement f ‾of f.

Make sure you use enough details to support your answer.