Part 2
Capacitor: 1microFarad
Potentiometer: 10kΩ
High End:
1/(2*3.14*10*.000001) = 15923.566hz
Low End:
1/(2*3.14*10,000*.000001) = 15.923hz
Low Pass:

High Pass:

Part 3)
(NEED SCHEMATIC)
Part 4)
To increase the filter by +6db/octave, one must add another capacitor and resistor to the circuit. For example, one pole is a 6db/octave filter and a two pole is a 12db/octave filter.
Part 5)