Beta decay occurs as either + decay or decay. An isotope of calcium Ca

Beta decay occurs as either β⁺ decay or β⁻ decay. An isotope of calcium Ca decays by β⁺ emission into the isotope ⁴⁶₂₁ Sc, and an isotope of magnesium ²³₁₂ Mg decays by β emission into the isotope ²³₁₁ Na.
a. Copy and complete the following decay equations for the calcium and magnesium isotopes.
i. Decay of calcium: ⁴⁶₂₀ Ca → Sc + β⁺ + ...
ii. Decay of magnesium: ²³₁₂ Mg → Na + β⁺ + ...
b. State what happens in each type of β decay in terms of the quark model of nucleons.
i. β⁻ decay
ii. β⁺ decay.
c. Name the force responsible for β decay.