What is the temperature of air after mixing the steam?

Question

10 cu m of atmospheric air at 25 ⁰C DBT and 12 ⁰C WBT is flowing per minute through a duct. Dry saturated steam at 100 ⁰C is injected through the duct. Dry saturated steam at 100 ⁰C is injected into the airsteam with a rate of 1.2 kg/min.

1. What is the temperature of air after mixing the steam?
2. What is the relative humidity of air after mixing the steam?                                   30+30