input: Write a python function to calculate the mean, median, and mode of a list of numbers.
  assert calculate_mean_median_mode([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])==[5.5, 5.5, 1]
  assert calculate_mean_median_mode([1, 2, 2, 3, 4, 4, 4, 5, 5, 6])==[3.6, 4.0, 4]
  assert calculate_mean_median_mode([10, 20, 30, 40, 50])==[30.0, 30.0, 10]
output: def calculate_mean_median_mode(numbers):
      from statistics import mean, median, mode
      mean_val = mean(numbers)
      median_val = median(numbers)
      mode_val = mode(numbers)
      return [mean_val, median_val, mode_val]