Array Types

function filterEvenNumbers(numbers: ________): number[] {
  return numbers.______((n) => n % 2 === 0);
}

function doubleNumbers(numbers: number[]): number[] {
  return numbers.___((n) => _____);
}

function sumNumbers(numbers: number[]): number {
  return numbers.reduce((acc, n) => acc + n, 0);
}