�PNG


IHDR�.%Z��	pHYs��
�+baSEC�YTIDATx�훿kALJ#�DH!�l%��AD�
�CDHaa!�X��YX��b#AD$���@�a�B,�R�#6oroe�ٛ�ݙٙ�~�[�����oN�b��I: �����p�@Q�I�H��U�.��\�:WH?a.��suI�{��.�V�"\�1m�G�-�"�=d�
�E���~�\Rm-^���3��b��rD�#�',�96ּ"6
s�!S�c��� �P�H�9�75׺��C�=Қ��R+6̒>��4�����
ՙ�È
�����kb���\w�M`��S��w�<v��"�l�k0�wH��cs���^�f���Gc��M�����|`r�m�W�l!7/�|�me��1��KҋW�&ז�y��H�˩�9�(��B����㪍er�.��g�ש�����=l��v��B��H���:ܯS.��-�_�f�@]�*�b�o�$s��_������e~��
K�5l� �o"݇U�W�>SS]�aH�Az��-�C]�E��W�:g.Y���)ퟰ{I7P�14iX\�U�bs��v�
�Y�}C����!T�L��s��*6W�<���lrB#υ�z��oL����!��UmE��7_��lE�Lq:�x|c�b�ys��&�Os�j�g6Q����b�s]3��zy���Wm���[dU'B}y��҅�P�����"}��sЩ��~ܬ��|��H�}���R��YyS�ܾ˱���!?����
�C��\�OED|e%!>��@�6~�����B�4��
a�u�s�e.ߧ""�T����FF��V�;)�ol�(c�oe�0��`.s
`��[ͺ�
�tEXtMathML<math xmlns="http://www.w3.org/1998/Math/MathML"><msubsup><mi mathvariant="normal">v</mi><mn>1</mn><mn>2</mn></msubsup><mo>+</mo><msubsup><mi mathvariant="normal">v</mi><mn>2</mn><mn>2</mn></msubsup><mo>=</mo><mfrac><mrow><mn>2</mn><mi mathvariant="normal">h</mi></mrow><mi mathvariant="normal">m</mi></mfrac><mfenced separators="|"><mrow><msub><mi mathvariant="normal">f</mi><mn>1</mn></msub><mo>-</mo><msub><mi mathvariant="normal">f</mi><mn>2</mn></msub></mrow></mfenced></math>.�wQIEND�B`�