At what positions of the simple pendulum its (i) P.E. is maximum (ii) K.E. is zero ?

Explanation

To solve the question regarding the positions of a simple pendulum where its potential energy (P.E.) is maximum and kinetic energy (K.E.) is zero, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding the Motion of a Pendulum**:
- A simple pendulum swings back and forth in a circular arc. It has two extreme positions (maximum displacement) and one mean position (equilibrium).

2. **Identifying Potential Energy**:
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