To be promoted to the level of Lead supervisor/scorekeeper on campus, you must demonstrate that you can easily and effortlessly convert a configuration of binary switches into their corresponding decimal value. As a reminder, a switch in the Down position represents a '1' and a switch in the UP position represents a '0'.

What does the configuration DOWN-UP-UP-DOWN-UP-DOWN-UP-DOWN-UP-DOWN represent where the leftmost switch (excess bit) DOWN denotes that the score is negative?  

What does the configuration DOWN-UP-UP-UP-DOWN-UP-DOWN-UP-DOWN-DOWN represent where all switches are used to represent numerical information?  

What does the configuration DOWN-UP-DOWN-UP-DOWN-DOWN-UP-DOWN-UP-DOWN-UP-DOWN represent where the leftmost switch is an excess bit, the next 5 switches represent the whole part of the number, and the remaining switches represent the fractional part of the number?