Hi can someone please help me thank you

Which statement best explains why ben uses the width hi to create the arc at j from point k

Im literally having a mental breakdown

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.