UnScramble this Word: i g n s l i s a?

Questions

Trivia : Which writer established the three laws of robotics?

Trivia : What does the musical term "rallentando" mean?

Trivia : How many players play in a volleyball team?

Trivia : Which country was the first to win the soccer World Cup 3 times?

Trivia : What is the modern name of "Pok-ta-Pok", which originated in Mexico?