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Given the following text description, write Python code to implement the functionality described below step by step
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Description:
 Title
Step1:  Create Matrices
Step2:  Add Matrices
Step3:  Subtract Matrices
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Python Code:
# Load library
import numpy as np
Explanation: Title: Adding And Subtracting Matrices  
Slug: adding_and_subtracting_matrices 
Summary: How to add and subtract matrices in Python.   
Date: 2017-09-03 12:00
Category: Machine Learning
Tags: Vectors Matrices Arrays
Authors: Chris Albon 
Preliminaries
End of explanation
# Create matrix
matrix_a = np.array([[1, 1, 1],
                     [1, 1, 1],
                     [1, 1, 2]])
# Create matrix
matrix_b = np.array([[1, 3, 1],
                     [1, 3, 1],
                     [1, 3, 8]])
Explanation: Create Matrices
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# Add two matrices
np.add(matrix_a, matrix_b)
Explanation: Add Matrices
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# Subtract two matrices
np.subtract(matrix_a, matrix_b)
Explanation: Subtract Matrices
End of explanation
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