import numpy as np

def extract_max_capabilities(data):
    """
    Extract maximum capabilities from a list of tuples.

    Args:
        data (list): List of tuples containing capability version, value, and other metrics.

    Returns:
        tuple: Tuple with the maximum capability version, value, and other metrics.
    """
    max_capability = max(data, key=lambda x: x[1])
    return (*max_capability[:2], np.mean(max_capability[2:]), np.std(max_capability[2:]))

# Example usage
data = [('v5_1768236144', 108217.11959687909, 721, 15009.3),
        ('v5_1768235312', 89435.63603047856, 734, 12184.7),
        ('v5_1768235983', 98379.19963352643, 987, 9967.5)]

print(extract_max_capabilities(data))