Show all work. this due at midnight

In the first question,
Total no. of classmates(asked by Theresa for vote)=n= 100
no. of classmates who say yes= 62
proportion= p = 62/100 = 0.62
To find the 95% confidence interval use the formula,
           
 
here,
1-α=95%
1-α=0.95
α(significance level)=0.05
α/2= 0.025
 From statistics table,
At α/2=0.025  z value is 1.96

By putting the values in above equation,
         
         =(0.5249, 0.715)

In the second question,
Total no. of highways=n= 125
no. of highways need to be repair= 75
proportion= p = 75/125 = 0.6
To find the 99% confidence interval use the formula,
           
 
here,
1-α=99%
1-α=0.99
α(significance level)=0.01
α/2= 0.005
 From statistics table,
At α/2=0.005  z value is 2.576

By putting the values in above equation,
         
         =(0.4871, 0.7129)

     
          
                       

If i'm correct the answer is $15.97