An unemployed person is 65 and will be based on the young spouse work record to sign up the Medicare part A and B. The spouse is less than 62 and has more than 40 work credits. A couple is currently covered by the spouse employer's medical insurance (more than 20 employees). Is it correct the elder person should sign up at least the premium free Medicare Part A but delay the enrollment of Medicare Part B because Medicare Part B is not free? Thank you for your answer.