For a sample of n=60, proportion p=0.5, and at a 95% confidence level, the lower bound of the proportion is ____.

95%, A=0.475

P=0.35

N=60

C=0.95, A=0475 which corresponds to z=1.65

SE= squr(0.35)(0.70)/60=0.0690

E=(1.65)(0.0690)=0.11385 or 0.121

0.121 is my answer but I'm not sure if I have set up the problem right. Thanks checking, list of possible answers are -

1. 0.229

2. 0.121

3. 0.175

4. 0.414