Requirements
1.	Provide working source code that will :-
	a.	For a given stock, 
	i.	calculate the dividend yield
	ii.	calculate the P/E Ratio
	iii.	record a trade, with timestamp, quantity of shares, buy or sell indicator and price
	iv.	Calculate Stock Price based on trades recorded in past 15 minutes
b.	Calculate the GBCE All Share Index using the geometric mean of prices for all stocks

Constraints & Notes
1.	Written in one of these languages:
	Java, C#, C++, Python
2.	No database or GUI is required, all data need only be held in memory
3.	Formulas and data provided are simplified representations for the purpose of this exercise


Table1. Sample data from the Global Beverage Corporation Exchange

Stock Symbol	Type	Last Dividend	Fixed Dividend	Par Value	
TEA				Common				0						100	
POP				Common				8						100	
ALE				Common				23						60	
GIN				Preferred			8				2%		100	
JOE				Common				13						250	

All number values in pennies