As part of a follow-up study, a researcher decided to investigate the effect that dosage of a drug (none, low dose, medium dose, high dose) and difficulty (easy, moderate, difficult) of a maze have on the number of attempts it takes for rats to complete the maze with no errors. They randomly assign the rats to the various treatment combinations and have them run the maze repeatedly until they complete it successfully. The results can be found in the file homework 4 maze. a) Identify the explanatory and response variables. For each, determine if they are categorical or quantitative. How many treatment combinations are there? How many rats are there per treatment combination? but if i gave you this information could you calculate how many rats?17 High Difficult 22 High Difficult 25 High Difficult 20 High Difficult 18 High Difficult 10 High Easy 1 High Easy 2 High Easy 5 High Easy 6 High Easy 13 High Moderate 13 High Moderate 16 High Moderate 8 High Moderate 14 High Moderate 25 Low Difficult 29 Low Difficult 18 Low Difficult 26 Low Difficult 26 Low Difficult 5 Low Easy 5 Low Easy 11 Low Easy 5 Low Easy 6 Low Easyso