price-weighted average

Given the following information concerning four stocks, 
Price Number of Shares
Stock A $10 100,000
Stock B 17 50,000
Stock C 13 150,000
Stock D 20 200,000
a) Construct a simple price-weighted average, a value-weighted average, and a geometric average.
b) What is the percentage increase in each average if the stocks’ prices become:
(i) A: $10, B: $17, C: $13, D: $40
(ii) A: $10, B: $34, C: $13, D: $20