An engineer is testing the electrical properties of a newly synthesized thin-film semiconductor. The table below lists the current readings obtained during three independent trials when a constant potential difference of 15.0 V15.0\text{ V}15.0 V was applied across the film.
| Potential difference (V) | Current 1st reading (A) | Current 2nd reading (A) | Current 3rd reading (A) | Mean current (A) |
|---|---|---|---|---|
| 15.0 | 1.42 | 1.48 | 0.96 | ImI_mIm |
Calculate the mean current ImI_mIm.