Please help i reward brainliest ;))

Vinay constructed this spinner based on the population of teachers at his school according to vinays model what is the probability that he will have a male history teacher two years in a row

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33

Laura read 1/8 of a comic book in 2 days. she reads the same number of pages every day. what part of the book does she read in a week