Gthe gompertz growth curve is used to model the growth of tumors. it is assumed that tumor growth starts slow, thenspeeds up and then slows again as the tumor approaches some maximum size. if the size of the tumor isl(t), the tumorgrowth rate varies with tumor size. the tumor growth rate is given by a function oflr(l) =alln(k/l)whereaandkare positive constants that are different for different tumor types.1. find all values oflfor which the rate of change given by the differential equationdldt=r(l)