During the Current Year Marin Company Incurred Several Expenditures

During the current year Marin Company incurred several expenditures. Briefly explain whether the expenditures listed below should be recorded as an operating expense or as an intangible asset. If you view the expenditure as an intangible asset indicate the number of years over which the asset should be amortized. Explain your answer.
(a) Spent $30000 in legal costs in a patent defense suit. The patent was unsuccessfully defended.
(b) Purchased a trademark from another company. The trademark can be renewed indefinitely. Marin Company expects the trademark to contribute to revenue indefinitely.
(c) Marin Company acquires a patent for $2000000. The company selling the patent has spent $1000000 on the research and development of it. The patent has a remaining life of 15 years.
(d) Marin Company is spending considerable time and money in developing a different patent for another product. So far $3000000 has been spent this year on research and development. Marin Company is very confident they will obtain this patent in the next few years.