Prospect theory numbers

Use $\alpha = \beta = 0.88$, $\lambda = 2.25$, $\gamma = 0.61$, $\delta = 0.69$. (a) What is the smallest gain $G$ that makes a 50/50 bet against a ₹1,000 loss acceptable (equal decision weights)? Show that $G/L$ does not depend on $L$ when $\alpha = \beta$. (b) A lottery-like option costs ₹20 and pays ₹1,000 with probability 1% (net outcomes +₹980 or −₹20). Compute its expected value and its cumulative-prospect-theory value with $w^+(0.01)$ on the gain and $w^-(0.99)$ on the loss. Interpret. (c) Verify Proposition 14.15 numerically for $z = \pm10$, $h = 5$, and show that for $z = -1$, $h = 5$ the investor sells. Which feature of $v$ causes the reversal?