Given the following question:
The first statement is false, speaking how a subset means apart of. 11, and 15 are apart of 11, 12, 13, 14, 15. Which means it is a proper subset.
The second statement is true. If the second symbol means a empty set that would mean that the first elements are not apart of the second element. So true.
The third statement is false. This is a proper subset because although they both have the same elements atleast one of the sets have a element that isn't apart of it's corresponding set. So it is a proper subset.
Finally the fourth statement is also false. Since this is a subset, each set has the same values as its corresponding set. Which means it is a subset of itself.Answer;
Explanations:
The reaction of magnesium and HCl is expressed as shown:
