Here are 2 right triangles

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

Which one ? is the answer and how to find this answer

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