4b. The archaeologists plan to build two more straight paths, AD and DC. For the paths to go around the site, angle BAD is to be made equal to 85° and angle BCD is to be made equal to 70° as shown in the following diagram. A485° 170 Find the size of angle BAC. 4c. Find the size of angle CAD. 4d. Find the size of angle ACD. 125 B diagram not to scale +70°C 200

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.