Answer 1) for market leader in pharmaceuticals the main focus is on the customers as pharmaceutical companies are those companies which manufactures drug for people rather than being competitive in the market. Hence they are describe as customer-oriented (i.e., strategy designed by examining primarily customer needs).
Answer 2) A market follower in a mature market follows a competitor-oriented (i.e., strategy based on competitors' actions) marketing strategy in order to sustain in the market. If they will not use this strategy, their survival will be difficult due to the entrance of the new firms.