1	
     2	public abstract class CapitalStrategy {
     3	    public final double capital(Loan loan) {
     4	        return riskAmountFor(loan) * duration(loan) * riskFactorFor(loan);
     5	    }
     6	
     7	    protected abstract double riskAmountFor(Loan loan);
     8	    protected abstract double duration(Loan loan);
     9	    protected abstract double riskFactorFor(Loan loan);
    10	}