Sup 6,50 Sam refuses to retire until his retirement account has a balance of at least $ 388,337 Sam refuses to make any more deposits in the account. The account currently has a balance of $ 128,762 and earns 6% per year, compounded semi-annually. How long does Sam have before he will retire? (You are computing number of years. Round your answer to one decimal place. For example, record 14.294 years as 14.3). Here Inter perio by tw