Fill in the blank to answer the following two questions: what is the blue line? is it flowing towards the top of the picture or the bottom of the picture?

the blue line is a it is flowing towards the of the picture.

river; top

river; bottom

valley; top

valley; bottom

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)