It depends on what location the sun is setting. For example, in the east side of the North America, the sun may set near 7pm to 7:30pm now that we are in summer, but in Europe, the sum may set at 8pm
Answer z=2
See picture attached for the math
Umm im not sure maby like 1+1 or sum
I believe it to be six but than again I could be sadly wrong