tolong dijawab yaa pls butuh banget nomor 1 beserta caranya

R = V/I = 1 volt / 0,5 A
R = 2 ohm

R = ρ . L / A
ρ = R . A / L
ρ = 2 . 2×10^-7 / 1
ρ = 4 × 10^-7 ohm.meter