$1.$ Which promotional mix elements does Volvo Trucks use?$2.$ How does the "life test" campaign demonstrate the characteristic of integrated marketing communication? What grade would you give "life tests" on integration effectiveness?$3.$ Is the consumer marketing approach taken by "Live Tests" appropriate for all B$-$to$-$B marketers? Explain$\mathrm{.}4.$ What challenges does Volvo Trucks face in maintaining the success it has achieved with this campaign? For each questions write a Significant paragraph by refering to the text and knowledge.