Please explain the fundamental marketing concepts using (https://www.happysocks.com/us/) as an example. The concepts are as follow marketing, value, exchange and relationship and the link between marketing, value, exchange and relationship. You need to explain the concepts theoretically and then explain it further usinghttps://www.happysocks.com/us.Minimum 5 sources of information (online articles, online newspaper/magazines, expert websites e.g. bloomberg.com) and 2 of them must be academic journals.