What skill does a worker need for JIT delivery?

Need on these last 2 questions on my social studies homework 5 and 6 then i’m done with the homework

Why hadn’t europeans used maritime routes before the age of exploration?

Anthony johnson, an african who arrived in virginia in 1621, a. learned the powhatan language and became a translator for governor thomas dale. b. owned slaves. c. translated the king james version of the holy bible into indian and african dialects. d. was the first slave who purchased his freedom with earnings from growing tobacco.