input: Write a python function to calculate average, median, and mode of a list of numbers using a class.
  assert StatisticOperation([1, 2, 3, 4, 5]).get_average() == 3.0
  assert StatisticOperation([1, 2, 3, 4, 5]).get_median() == 3
  assert StatisticOperation([1, 2, 3, 4, 5, 5]).get_mode() == 5
  assert StatisticOperation([6, 1, 2, 5, 1]).get_average() == 3.0
  assert StatisticOperation([6, 1, 2, 5, 1]).get_median() == 2
  assert StatisticOperation([6, 1, 2, 5, 1]).get_mode() == 1
output: from statistics import mean, median, mode
  
  class StatisticOperation:
      def __init__(self, numbers):
          self.numbers = numbers
  
      def get_average(self):
          return mean(self.numbers)
  
      def get_median(self):
          return median(self.numbers)
  
      def get_mode(self):
          return mode(self.numbers)