please diisi bsk mw kmpul

t = 4 s
Q = n. e = 10^20 . 1,6 × 10^-19
Q = 1,6 × 10
Q = 16 coulomb

A)
I = Q / t
I = 16 / 4
I = 4 Ampere

B)
V = I . R
V = 4 . 20
V = 80 volt