ALGEBRA 1 MATH QUESTION! PLEASE HELP I GIVE BRAINLYEST FOR CORRECT ANSWER The pattern in the sequence continues indefinitely. 1, 9, 2, 8, 3, 7, 4, 6, 5, 5, 6, 4, ...

a. Describe what you notice about the sequence.

b. If the first 40 terms are added together, what is the total?​