Extra Credit

The extra credit is due by the end of classes. Passing the tests is the first step. All extra credit work must be checked out by Prof. Cosgrove.

Complete all four:

1. Merge Sort Parallel Combiner
2. Sudoku Extra Constraint Propagation
   1. Unit Constraint Propagation
   2. Naked Twins Propagation
3. Connect Four
4. Work-efficient Blelloch Scan

class:	ParallelExtraCreditTestSuite.java
package:	all.extracredit
source folder:	testing/src/test/java