Hello, I am unable to solve thee set of questions. May I have clarification with step-by-step solutions. Thank you.

4.-A consumer's preferences can be represented with the utility function U( y1,y2)= 3y12 + 9 a) Derive and represent in a graph indifference curves for U = 26 and for U = 62. b) (You will have to think a little out of the box, now) We are told that the prices are p, = $6, and p2 = $2, and the consumer is "attaining a utility" (that phrase has no meaning, really, but we have fixed a utility function) of 90. What is the consumer's income