(a) The values shown by Shalini are :
(i) high degree of general awareness/
(ii) ability to take quick decisions,
(iii) concern for her aunt,
(iv) helping and caring nature
(b) In microwave oven, microwaves of required wavelength get strongly absorbed by water due to its energy which heated the water. Since every food items has lot of water, so they can be heated and cooked quickly in a microwave over. With this, the microwaves heat the food item completely, not simply from outside as in case of normal oven.