code: # Multiple time series on common axes
  
  # Import matplotlib.pyplot as plt
  import matplotlib.pyplot as plt
  
  # Plot the aapl time series in blue
  plt.plot(aapl, color='blue', label='AAPL')
  
  # Plot the ibm time series in green
  plt.plot(ibm, color='green', label='IBM')
  
  # Plot the csco time series in red
  plt.plot(csco, color='red', label='CSCO')
  
  # Plot the msft time series in magenta
  plt.plot(msft, color='magenta', label='MSFT')
  
  # Add a legend in the top left corner of the plot
  plt.legend(loc='upper left')
  
  # Specify the orientation of the xticks
  plt.xticks(rotation=60)
  
  # Display the plot
  plt.show()
  
apis: matplotlib.pyplot.plot matplotlib.pyplot.show matplotlib.pyplot.legend matplotlib.pyplot.xticks