Answer :
Blake should most likely focus on the question: "Is it measurable?" This is because Blake is struggling with understanding how his average salary can fund his retirement dream in specific dollar amounts. By ensuring that his goal is measurable, he will be able to quantify his average salary and expenses accurately to assess if he can achieve his retirement plans.
By setting a measurable goal, Blake can track his progress towards saving for retirement and adjust his financial strategies accordingly. This will help him stay on track and make informed decisions to secure his financial future.
In summary, focusing on whether his goal is measurable will allow Blake to tangibly track and evaluate his progress towards retiring in comfort based on his average salary.