Fair and Biased

Is this question biased of fair: "Which do you prefer, that ugly old sweater of this awesome new jacket?"

State wether this is biased or random: You want to survey employees at a company so you put all of the employees' names on slips of paper and then put a blindfold on and pull 10 names from a hat. You then survey those people.

State wether this is biased or random: To determine what class a student gets into at school names are entered in a software program, which then randomly selects students for each class.

Is this question fair or biased: "This is the greatest class ever, isn't it?"

Is this question fair or biased: " Do you like my cute backpack?"

State wether this is biased or random: You want to know what sports teams kids in you school root for, so you stand by the door to the cafeteria and ask the 12th kid who enters.

Is this question fair or biased: " Isn't he an adorable little kitty?"

State wether this is biased or random: You want to know how many hours of video games kids around your age play a day, so you make an alphabetical list of every student in the school and then you survey every 10th kid from that list.

Is this question fair or biased: " How many old coins do you own?"

State wether this is biased or random: You survey customsers at a mall. You want to know which stores they shop at the most. You walk around a toy store and chose customers there for your survey.