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

 - When placed in the sun, does a glass jar wrapped in cotton heat up more than a glass jar wrapped in wool?
 - When placed in the sun, does a glass jar wrapped in a black cotton shirt heat up more than a glass jar wrapped in a white cotton shirt?
 - When wrapped in a cotton shirt and placed in the sun, does a large jar or a small jar heat up more?