8 0/1 as a improper fraction

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

Ined this is due tomorrow and i dont know the answer can you find all the exponents

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r