Answer
a- Marketing- Because of promoting the product at conference
b- Design of product and process - Engineering the product for a better functioning
c- Customer service - Because to handle customer questions and greivances
d- Research and development - Because to develop new products
e- Marketing - Marketing the product through celebrities
f- Production - Concerning with manufacture of product
g- Marketing - Because of making sales
h- Distribution- Because of distributing the product
Work Step by Step
a- Marketing- Because of promoting the product at conference
b- Design of product and process - Engineering the product for a better functioning
c- Customer service - Because to handle customer questions and greivances
d- Research and development - Because to develop new products
e- Marketing - Marketing the product through celebrities
f- Production - Concerning with manufacture of product
g- Marketing - Because of making sales
h- Distribution- Because of distributing the product