Please deeply answer the following question and leave the references

Please deeply answer the following question and leave the references. Thank you!

1.     Why is sampling a good marketing tool to influence low-effort decisions?

2.     In terms of choice tactics, explain the risk that Starbucks takes if consumers who sample Pike Place coffee do not like it.

3.     Why would Kimberly-Clark arrange to distribute coupons in supermarkets at the same time that it had Viva towel samples stitched into magazines?

4.     What role might normative influences play in the product decisions made by students who receive samples during spring break?