Implemented Binary Search-2

[johar-inderpreet]

• FindFirstAndLastPosition in a sorted array with duplicate elements
• Find Minimum element in a rotated sorted array
• Find Peak element in the array

[super30admin]

• The student's solution is well-implemented and follows best practices. The logic is clear and concise.
• The inclusion of comments and descriptive variable names enhances readability.
• The solution handles edge cases effectively, such as when the array is already sorted or contains a single element.
• One minor improvement could be to ensure consistency in the return statement. The reference solution returns -1 as a fallback, while the student's solution returns arr[low]. While this works in practice, it's good to clarify the fallback behavior in comments.