code: def plane(individual):
      r"""Plane test objective function.
  
      .. list-table::
         :widths: 10 50
         :stub-columns: 1
  
         * - Type
           - minimization
         * - Range
           - none
         * - Global optima
           - :math:`x_i = 0, \forall i \in \lbrace 1 \ldots N\rbrace`, :math:`f(\mathbf{x}) = 0`
         * - Function
           - :math:`f(\mathbf{x}) = x_0`
      """
      return (individual[0],)
  
imports: import random
  from math import sin, cos, pi, exp, e, sqrt
  from operator import mul
  from functools import reduce
label_desc: Use image node_id 2 for calling a global function with example usage: plane(individual) and returns: individual