Sole activity consists.

1 21/i+2,/,=5 1 2+2V,=4‘/j iv. 6*/« Vs 3U G 1 2‘/,+3*/i=5 1 3+ 5 =8 i1/. 12 4 6 m s. D. 7 0 1 3>/2 5 8»/i.