The five democratic presidents are:
John Fitzgerald Kennedy (1961-1963)
Lyndon Baines Johnson (1963-1969)
Franklin Delano Roosevelt (1933-1945)
Harry S. Truman (1945-1953)
and James Buchanan, Jr. (1857-1861)
Generally speaking, to figure out price and quantity in a monopoly, a business finds the point at which marginal cost equals "b) Marginal revenue," since this is the point at which the product can be sold.
Reagan's time as President was so impactful on the USA that he is often quoted and his administration is often used as the gold standard when people are talking about national policy.
Sultan Muhammad Rumfa of the Delhi Sultante