What is the first thing you need to do if someone is on fire?

Roll over the ground as fast as possible and cover the person as soon as possible.

Explanation:

When you run, the body on fire catches oxygen which stimulates a combustion reaction hence causing the fire to grow bigger.

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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