1 (TRY IT). If a shape has four right angles, it is a square.
2 (TRY IT).
Converse: If you must come to a stop, then the traffic light is red.
Inverse: If the traffic light is not red, then you must not come to a stop.
Contrapositive: If you must not come to a stop, then the traffic light is not red.
I hope these are the answers you are looking for. If not, please message me again and we'll look into it further. Please also message me if my logic is flawed.