�PNG


IHDR�d��	pHYs��
�+baSEɒ޵�IDATx��?hAƇ�	"� �"� �B��"Vi,�� bl���N�BD�� ����B��*����D�#���ޑe������Yw�>����v�f��n�*?ס�]�<�����m�]�
MC�%Oi��l��z;3�H������>
݆6~� ������IX{�:t|�y\�\ۡ��^x]�0��M�Zg�[��=1���!���[i�D#�������<��d^��3�~�h���T�<D;@���	}�~A�\@y����Y=����CW��;Х�E�л���#��Ģ��sz ��/�|<=6���h
���^�-���Up�`�nC7S�ç���D��L�To*P�A~I��O˲M�5�v��e_�+X��|R���G?�N#mt�J]��G�ׯM:�mZ'o'~B��+��EۣɅ��Ϧ��C�Uh<�}���Q�I7
^�;�"���4�����?�,��")��҉B�Y��&_y�^T��a�����\����[f=WUogh�-�o2;��b��/��?��k�<y�g�yL��@�yT[�\�u\��2�f�;NW�[�Gg��Fΐ޴�
:Vݛ�c
�i]I��F�x�g�R*�t�x)��)�{7��S��ޮ� XCϏmZ�E}��k��L���,���cG���9�f$�܉�xT
�K�w�R�����D*gMD��Q^}�&���󬔀 �qR
~_��ܼ4� � � B������r���ZtEXtMathML<math xmlns="http://www.w3.org/1998/Math/MathML"><mstyle mathsize="12px"><mo>=</mo><mo>&#xA0;</mo><mi mathvariant="normal">&#x3C3;</mi><mn>1</mn><msup><mi mathvariant="normal">s</mi><mn>2</mn></msup><mi mathvariant="normal">&#x3C3;</mi><mo>*</mo><mn>1</mn><msup><mi mathvariant="normal">s</mi><mn>2</mn></msup><mi mathvariant="normal">&#x3C3;</mi><mo>*</mo><mn>2</mn><msup><mi mathvariant="normal">s</mi><mn>2</mn></msup><mi mathvariant="normal">&#x3C3;</mi><mn>2</mn><msubsup><mi mathvariant="normal">p</mi><mi mathvariant="normal">z</mi><mn>2</mn></msubsup><mi mathvariant="normal">&#x3C0;</mi><mn>2</mn><msubsup><mi mathvariant="normal">p</mi><mi mathvariant="normal">x</mi><mn>2</mn></msubsup><mi mathvariant="normal">&#x3C0;</mi><mn>2</mn><msubsup><mi mathvariant="normal">p</mi><mi mathvariant="normal">y</mi><mn>2</mn></msubsup></mstyle></math>M��IEND�B`�