Answer:
The nominal federal funds rate be changed to 3%
Step-by-step explanation:
Hi, in order to find the new nominal federal fund rate, we have to use the following equation.

Where:
I = Nominal fed funds rate (what we are looking for)
R*=Real federal funds rate (changed from 1% to 3%, we use 3%)
PI= Rate of inflation (current inflation, in our case, 1%)
PI*=Target inflation (expected inflation, 3%)
Everything should look like this.
I = 3% + 1% + 0.5(1% - 3%)
I = 4% - 0.5(-2%)
I = 4% - 1%
I = 3%
So the nominal federal funds rate should be 3% under this problem´s conditions.
Best of luck.