Response to the following questions:
a. What does it mean that a U.S. firm's new stock offering might contain a Euroequity tranche?
b. How does an IDR avoid the often cumbersome and usually costly regulations about the issuance of a domestic firm's securities in a foreign country?
c. What is the major difference between an American depositary receipt and an American depositary share?
If possible, please give examples to better understand your answers.