HELLO, I'M STUDYING FOR MY EXAM AND PLEASE EXPLAIN STEP BY STEP IN ORDER TO UNDERSTAND IT. THANK YOU

1, Suppose that a monopolist faces linear demand given by

Q(p)=100-3*p

The monopolist also pays a marginal cost of $1 for each unit produced.

What is the optimal quantity that the monopolist will charge to maximize its profits?

2, If the Intra Industry Trade Index equals 0 or a given Country...

A. Value of Imports = Value of Exports, in some industry

B. Value of Imports > Value of Exports, in each industry

C. If a country imports in an industry, it doesn't export in that industry

D. If a country exports in an industry, it doesn't import in that industry