Can someone please explain every number on the left means? I dont know how to get them like why it is -1log1 and 0log0. Thank you!

i1? 08ClassBasic.pdfMiderm Sample A Race Income Child Insurance root child yes/ child= no 1 black high no yes 2 white high yesyes (1, 5, 6, 7, 8)-|--| white | low | yes yes Insurance: 3 Yes; 0 No Insurance: Yes: 4 No 4 white low yes yes 5 blacko no no 6 blackno no 100% Yes 0%No 200% Yes 80% No 2, 3, 4 Info(T)--ys log .log 7 blackowno no For attribute Child, nfolT)-1 log 1-0 log 0 Info(T) 1/5 log 1/5 - 4/5 log 4/S0.7219 Info(Child, T)-3/8xInfo(T)+5/8 x Info(T)0.4512 Gain(Child. T)- Info(T)- Info(Child, T) 1-0.4512 0.548 For attribute Race,Gain(Race. T)-0.1887 For attnbute Income. Sain(Income, T)-0.31 13 For attribute Child,Gain(Child, T) 0.5488