Write the line notation for a cell in which the cell reaction is as follow
H2 + I2 = 2 HI

I2(g)/I^-(aq)//H2 (g)/H^+(aq)

Explanation:

Let us remember that in every redox reaction, a specie is oxidized and a specie is reduced.

This means that one specie looses electrons while the other species gains electrons.

Considering the overall reaction; H2 + I2 = 2 HI

Oxidation half equation;

H2 (g) > 2H^+(aq) + 2e

Reduction half equation;

I2(g) + 2e > 2I^-(aq)

Line notation;

I2(g)/I^-(aq)//H2 (g)/H^+(aq)

the answer is learned