(a) Use a Riemann sum with to estimate the value of , where . Take the sample points to be lower left corners. (b) Use the Midpoint Rule to estimate the integral in part (a).

CHAPTER 14 PUBLIC RELATIONS: Defining public relations: Advertising and PR are attempts at persuasions and use mass media. PR is management functions but advertisement is marketing function. PR is not involved in interpersonal communications. Advertisement is sponsored but PR messages appear as features, news stories or editorials and space and time...