A student takes three measurements of the mass of an object. If the actual mass is 8.54 g, indicate whether each set of measurements is precise but not accurate, accurate but not precise, both accurate and precise, or neither accurate nor precise:

(a) 6.38 g, 9.23 g, 4.36 g 

(b) 8.53 g, 8.59 g, 8.55 g 

(c) 9.53 g, 8.54 g, 7.54 g 

(d) 6.25 g, 6.27 g, 6.26 g