PLEASE HELP WILL GIBE BRAINLEAST How many solutions does the system of equations have?

a. no solution
b. One solution: x = 0, y = 5
c. One solution: x = 1, y = 4
d. Infinitely many solutions

Atextile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. the company wishes to test the hypothesis upper h subscript 0 baseline colon mu equals 12 against upper h subscript 1 baseline colon mu less-than 12 using a random sample of n equals 4 specimens. calculate the p-value if the observed statistic is x overbar equals 11.8. round your final answer to five decimal places (e.g. 98.76543).