Find the sum of the following series. 1 (n - 6) (n - 6- 1) where b E (-0o, 0) You will not receive any credit for substituting a number for b, then finding the sum of the resulting series. Please write the solution this question, take a photo of it, then upload it in whatever file format before moving on to the next question (not a folder/zipped file/rar archive -- maximum 1 file [if you have more than 1 page, please use CamScanner or AdobeScan to consolidate into one pdf file]). Show all work clearly and in order. To obtain maximum marks, your answer should be in a form that another student could understand without undue effort. A poorly expressed but correct result is not sufficient. *** Please check that the file you uploaded is the correct file, as there will be no way to resubmit it once you've moved on to the next question. ***