def round_minutes(t):
    if t >= 53 and t <= 59:
        return 1.0
    elif t >= 0 and t <= 7:
        return 0.0
    elif t >= 8 and t <= 22:
        return 0.25
    elif t >= 23 and t <= 37:
        return 0.50
    elif t >= 38 and t <= 52:
        return 0.75