Celia has a bag of tennis balls and baseballs. there are 12 tennis balls and 5 baseballs. celia gave her sister 3 tennis balls. celia's sister already had 6 tennis balls. how many balls are left in celia's bag?
a. how many tennis balls does celia's sister have now?
b. how many tennis balls does celia have left in her bag?
c. how many balls did celia give to her sister altogether?
d. how many tennis balls and baseballs combined does celia have in her bag now?

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)