Using only these supplies, which question can Vicky investigate with an experiment?

 - When placed in the sun, will eight ounces of water in a glass jar or eight ounces of water in a plastic cup get warmer?
 - When placed in the sun, will eight ounces of water in a closed jar or eight ounces of water in an open jar get warmer?
 - Will eight ounces of carbonated water or eight ounces of tap water get warmer when placed in a jar in the sun?