(i) A radioactive nucleus 'A' undergoes a series of decays as given below :
`A overset(alpha)rarr A_(1) overset(beta)(rarr)A_(2)overset(alpha)rarrA_(3)overset(gamma)(rarr)A_(4)`.
The mass number of atomic number of `A_(2)` are `176` and 71 respectively. Determine the mass and atomic numbers of `A_(4)` and A.
(ii) Write the basic nuclear processes underlying `beta` and `beta^(-)` decays.

Explanation

Let's solve the problem step by step.

### Part (i)

1. **Identify the given information:**
- Mass number (A) of \( A_2 \) = 176
- Atomic number (Z) of \( A_2 \) = 71
- The decay sequence is:
...