How do u make a tissue dance (i know the answer but i need to show my work) pls answer and show work (+_+)

Can someone pls ! pls answer all. no explanation needed..

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?