how do I solve this

Page :I. or to MATH1040 Statistics for Laboratory Sciences Question 1 [Total of 10 marks) Polyethylene Terephthalate (PETE) a common food grade plastic widely used for packaging bottled drinks. A recycling plant will clean and sort the plastic before it is melted for reuse. The melting point of a PETE plastic bottle Is approximately Normal with mean 250%: and standard deviation 12C. ta} {5 marks} What is the probability a PETE plastic bottle has a melting point exceeding 273'C? Sketch diagram here [hi {5 marks} The recycling plant manager randomly selected 16 PETE plastic bottles. What percentage of these plastic bottles has an average melting point less than 245C? Sketch diagram here Page 2 of 18