Good afternoon, could someone explain to me how these problems are solved?

Instructions: Using nonparametric test methods solve the following problems.

1.-An experiment is carried out to compare the densities of cakes made from two different kinds of cake A and B. 6 trays of cake dough (A) and 6 received the dough (B). Waiting for a variation in oven temperature. The experimenter places 6 different locations in the oven. Test the hypothesis that "There is a difference in the distributions in the densities of the cakes. One increases +0.010 grams against another that increases +0.010 grams. Use a significance level of 0.05