MHB How would I plot the following signals?

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To plot the signals 𝑠(𝑛1, 𝑛2) = 𝑒(𝑛1, 𝑛2)𝑒(𝑛1, 𝑛2 + 2) and 𝑠(𝑛1, 𝑛2) = 𝛿(𝑛1 βˆ’ 𝑛2 + 1), it's essential to define the functions involved. The unit step function 𝑒(n1, n2) typically represents a step that activates at certain indices, while the delta function 𝛿(n) indicates a spike at a specific point. For plotting, a 3D surface plot or a contour plot can effectively visualize the two-dimensional signals. Understanding the behavior of these functions will guide the appropriate graphing method. Clarifying the definitions of 𝑒(n1, n2) and 𝛿(n1) is crucial for accurate representation.
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I am extremely confused as how to go about this, any help would be greatly appreciated!

The signals are:

a) 𝑠(𝑛1, 𝑛2) = 𝑒(𝑛1, 𝑛2)𝑒(𝑛1, 𝑛2 + 2)

b) 𝑠(𝑛1, 𝑛2) = 𝛿(𝑛1 βˆ’ 𝑛2 + 1)
 
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Plot how? On what kind of graph? Can you state exactly how "u(n1,n2)" and "𝛿(𝑛1)" are defined?
 

Thread 'Area of Overlapping Squares'

Here is a little puzzle from the book 100 Geometric Games by Pierre Berloquin. The side of a small square is one meter long and the side of a larger square one and a half meters long. One vertex of the large square is at the center of the small square. The side of the large square cuts two sides of the small square into one- third parts and two-thirds parts. What is the area where the squares overlap?
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