Please solve these three questions related to microeconomics course step by step and with explanation

Question #1 Two students studying microeconomics are trying to understand why the tangent condition studied in this chapter means utility is at a maximum. Let's listen: Student A. If a person chooses a point on his or her budget constraint that is not tangent, it is clear that he or she can manage to get a higher utility by spending differently. Student B. I don't get ithow do you know he or she can do better instead of worse? Question #2 A consumer consumes only two goods X and Y. Her utility function is given by: U (X,Y) = VX + 2Y. Suppose that the price of good X is $1, the price of good Y is $8, and the consumer's income is $68. How much 1. Graph the indifference curve: U=12 2. goods X and Y should the consumer buy to maximize utility? 3. Suppose now that the price of good Y decreases to $4 while the price of good X and income does not change (Py = $1,I = $68) . How much good X and good Y should he buy to maximize his utility? Are goods X and Y substitutes, complements, or unrelated? Explain 4. Construct demand curve for good Y Question #3 A consumer's original utility maximizing market basket of goods is shown in the figure as point B. Following a price of goods X increases. Answer below questions based on the graph. 1. 2. The substitution effect from a price increase is a movement from point to point The income effect from a price increase is a movement from point______ topoint_____ . The total effect from a price increase is a movement from point______ to point The value of substitution effect = The value of income effectis = Good X is (normal, inferior or Giffen) Goods Xand Y are (substitutes, complements, or unrelated) 10 1720 Q of rice e