Misc: Which country is indicated by the car identification letters RA?

Questions

In 1982 Britain requests ---------- arrange for return of prisoners. ?

In 1991 Boris ---------- elected president of Russian SSR. ?

In 1579 Sir Francis ---------- lands on the coast of California.?

In 1579 Sir Francis Drake lands on the coast of---------- .?

In 1870 George---------- , the inventor of "Wheaties" cereal?