1. For each instruction below, show the code and the results from running the code following each of the instructions below. Answer any questions.
2. 
   a) Creating Arrays
   1) Make a one-dimensional array named "basic_arr" that contains four integer values.
3.  
4. 2) Make an array named 'main_arr" that contains 16 values from 10 to 25 that are formatted as four rows and four columns.
5. 
   3) Make an array named 'sub_arr" that contains 16 random values that are formatted as four rows and four columns.
6. 
   Question:
   • How does a vector and matrix differ?
7. 
   b) Accessing Array Elements and Attributes
8. 
   1) Use "main_array" and indexing to display the different elements in the array
9. 
   2) Display "main_arr"'s attributes:
   dimension
   size
   shape
   data type
10. 
    c) Aggregate Functions
11. 
    1) Display the following statistical information about the data stored in "main_arr":
    Sum
    mean
    median
    minimum value
    maximum value
    standard deviation
12. 
    d) Arithmetic Operations, Matrix Operations, Broadcasting, and Comparisons
13. 
    1) Use "main_arr" and "sub_array" to demonstrate the following arithmetic operations:
    addition
    subtraction
    multiplication
    division
14. 
    2) Use "main_arr" and "sub_array" to demonstrate finding the matric product of the two arrays.
15. 
    Question:
    • How do matrix operations differ from normal arithmetic operations?
16.  
17. 3) Use "main_arr" and "basic_array" to demonstrate broadcasting using addition
18. 
    Question:
    • What does broadcasting do?
19. 
    4) Using "main_arr" to demonstrate comparison. Find all of the values that are greater than or equal to 7
20. 
    Question:
    • What modifications to the code would be required to save all of the values greater than or equal to 7 in a new array?
21. 
    e) Joining, Splitting, and Splicing Arrays
22. 
    1) Use "main_arr" and "sub_array" to demonstrate joining two arrays both horizontally and vertically.
23. 
    2) Use "main_arr" to demonstrate splitting the array as follows:
    Two 2 x 4 arrays
    Two 4 x 2 arrays
24. 
    3) Use "main_arr" to demonstrate slicing the array as follows:
    An array that contains just the data from the third row
    An array that contains data from the third column
25. 
    Question:
    • How does splitting differ from slicing?
26. 
    f) Saving and Loading Arrays
27. 
    1) Save "sub_arr" to an external file named "saved_sub.npy".
28. 
    2) Load an external file named "saved_sub.npy".
29. 
    Question:
    • Why might a text file be used to save data rather than a binary file?