Question: Suppose that two neighbors with identical preferences derive utility from the number of flower gardens in their shared community lot, x, and on the number of tomatoes that they eat from their own vegetable gardens, y. The specific form of the utility function is given by:

U_i(x,y_i) = 1/4 lnx + 3/4 lny

The price of one flower garden is $1 and the price of a vegetable garden is $2. Each neighbor has a budget of $12.

A. How do you find the MRS?

I need an in depth explanation on how to find the MRS of this question, The answer is 4y/12x

I'm just not sure how to get there, please show step-by-step. Thank you!