Formulate a problem statement and research objectives for the following situations:

a. A Chinese manufacturer wants to investigate whether or not Chinese nationals would be effing active sales representatives in the European market.

b. A Japanese sushi chain wants to see if menu prices should be broadly equivalent to home prices for their new South Korean outlets.

c. A software manufacturer wants to gauge customer reaction to automated updates initiated without customer authorization.

d. An Indian tea cultivator wants to find out how to sell his premium tea blends directly to the UK market.