Nuclear fusion in the stars occurs by a series of reactions. Complete each of the following nuclear fusion equations.
a) (¹H + ¹H → ²He + (energy))
b) (⁴He + ⁴He → ⁸Be + (energy))
c) (⁸Be + ¹H → ⁹B + (energy))
d) (⁹B → ⁹Be + e⁺ + νₑ)