What is the total displacement of a student who walks 3 blocks East, 2 blocks north, 1 block west and then 2 blocks south

Place me with this question is my last question

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.

What are the similarities & differences between a thermistor and a light dependent resistor in physics?