please can you help me with the equation for an indifference curve , the MRS

4. (18 points) Suppose a consumer has preferences over two goods that can be represented by the quasi-linear utility function U(x, y) = Vi + y. (a) (5) Find the equation for an indifference curve for this utility function. (b) (5) Find the MRS for this utility function. (c) (8) Suppose price for x is pr = 1, Suppose price for y is py = 10. what is minimum income a consumer has in order to NOT have a corner solution for her/his optimal bundle? 5. (Bonus, 5 points) Continued from Question 3. 3.(c) After evaluating this policy, the government decides that the tax is too harsh. It now declares that the tax will kick in only after 5 apples. (If x1 5 5, there is no tax. But if x1 > 5 , the tax applies to each apple that exceeds this cutoff.) Sarah will now face a kinked budget line. Write the equations corresponding to each part of her budget line, and draw them on a graph (indicate the bundle at which the kink occurs)