For question 3.2, I don't know how alpha was calculated at 3/5. Where did that number come from?

3.2) We already know that:

(9,4) (4,9)

(4,9) (4,9)

So, for all(0,1), it must be the case that:

(9,4)+(1)(4,9) >(4,9)

Setting =3/5, we get:

3/5(9,4)+2/5(4,9) >(4,9)

Again, the math individual math makes sense, but I can't tell how alpha was set to 3/5.

Thank you!