Which strategy, first and late-mover, is better to use for entering a

1.  Which strategy, First and Late-Mover, is better to use for entering a new market? What is the difference between Vertical vs Horizontal Diversification Strategies and which is best for improving scale economies for a business? 
2.What is Ansoff’s Product/Market Framework? Explain the difference between suitable, acceptable and feasible when selecting strategic options
250 words each question in word document. no citations required.