Kindly complete part a by Hand. Complete part b using the Hand calculations first to obtain rt secondly obtain r by using EXCEL, kindly print the output and obtain the r value and ensure that you get the same answer using these 2 methods. Also in part b, Interpret the meaning of the value of r in few sentences. 2.52. Establishing the properties of materials is an important problem in identifying a suitable substitute for biodegradable materials in the fast-food packaging industry. Consider the following data on product density (g/cm3) and thermal conductivity K-factor (W/mK) published in Materials Research and Innovation (1999, pp. 2-8). (a) Create a scatter diagram of the data. What do you anticipate will be the sign of the sample correlation coefficient? (b) Compute and interpret the sample correlation coefficient