Please Answerer these short answer questions,

I have been having some difficulty grasping the concept, thank you!

-What is the shape isoquants for Leontief production functions have?

-describe why a firm's short run total cost curve doesn't start at origin.

-True or False?

If technological progress makes both inputs a firm uses more productive, its isoquant will shift out , relative to the one prior to technological change. briefly explain your answer.