Which substance is being oxidized and which is being reduced?
4Ag(s) + 2H2S(g) + O2(g) -->
2Ag2S(s) + 2H2O(g)

Oxygen is being oxidized while Ago is reduced

11 players on a field that has a maximum of 11 players

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer