<prompt> Translate the following text to EnglishKama inavyoonyeshwa katika mchoro wa 1.4, mapato kutoka kwa kazi ya kuendelea yanawakilisha mguu wa nne kwenye stool ya mapato ya kustaafu.  <response>: As shown in figure 1.4, earnings from continued employment represent a fourth leg on the retirement-income stool. 