The average giraffe's height is 490 cm (with a standard deviation of 18 cm). The giraffes at the zoo (n=22) are 510cm on average. Are the LA Zoo giraffes significantly taller than average? Test this with a one-sample z-test. Show all your logical steps in testing this hypothesis (including raw formulae). Write your results in a complete sentence (such as in class). Do NOT include effect size and confidence interval.