How do i do this? Question 1 options:

Law of Contrapositive

Law of Detachment

Law of Syllogism

Not a valid conclusion has been made.

1.
If it is raining, I will use an umbrella.

It is raining.

Therefore, I will use an umbrella.

2.
If the sun sets, it will be dark outside.

It is not dark outside.

Therefore, the sun hasn't set yet.

3.
If I do well on my assignments, my grade will improve.

If my grade improves, my parents will be happy.

Therefore, if I do well on my assignments, my parents will be happy.

4.
If I cook dinner, my daughter will eat.

My daughter ate.

Therefore, I cooked dinner.