Kimberly put 1/4 of her allowance in the bank. she spent the rest at the mall. what percent of her money did she spend at the mall? and how

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.