风险厌恶系数

def solve(____):
    if utility_func == "____":
        gamma = ____
        ara = gamma / wealth
        rra = gamma
    elif utility_func == "____":
        a = ____
        ara = a
        rra = a * wealth
    else:
        ara = ____ / wealth
        rra = ____
    return {"____": utility_func, "____": wealth, "____": round(____), "____": round(____)}