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The solution will be posted in a sequential hint based format. You have to verify the steps of hints.

### Sequential Hints:

Step 1:

Solution set of sin($$\frac{x+y}{2}$$) = 0 is {$${x + y = 2n\pi : n \in \mathbb{N}}$$}

– A set of parallel straight lines.

Step 2:

Solution set of |x| + |y| = 1 has the picture of a diamond as follows:

Step 3: