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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.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Charlie tosses five coins.what is the probability that all five coins will land tails up.