quantity demanded

A change in quantity demanded (or a movement along the demand curve) is caused by a change in its own price while a change in demand (or a shift of the demand curve) is caused by a change in nonprice determinants that include changes in consumers’ income, taste or preference, price of other goods, expected future price,

If Coke’s price increases, what will happen to the demand or quantity demanded for Pepsi, all other things being equal?
Explain whether it is a movement along the demand curve or a shift of the demand curve.
If Coca-Cola develops a new technology that makes Coke tastier, what will happen to the supply curve and demand curve for Coke?
Is the demand (curve or schedule) for Coke or Pepsi seasonally different?
What is the relationship between Coke and Pepsi? Do they have the same demand curve or are they different? Explain your reasoning.