1. This question is for the practice of generating the regular sequence and applying certain R functions. (a) Calculate m-1 X and compare with n(n+1), for n = 100, 500, and 1000. (You may assign each sequence with each variable.) (b) Calculate 22123 and compare with n?(n+1)?, for n = 100, 500, and 1000. (You may assign each sequence with each variable.)