roblem $14-1$ Cumulative Abnormal Returns

elta, United, and American Airlines announced purchases of planes on July $18(7/18),$ ebruary $12(2/12),$ and October $7(10/7),$ respectively.

$\backslash$table$[[$Date$,$Delta,United,American$],[$Market$,$Company,,Mark,Company,,Market,Compa$],[$Return$,$Return,Date,Return,Return,Date,Return,Return$],[\frac{7}{12},-\mathrm{.}36,-\mathrm{.}51,\frac{2}{8},-\mathrm{.}85,-1\mathrm{.}10,10/1,\mathrm{.}56,\mathrm{.}25],[\frac{7}{13},\mathrm{.}00,\mathrm{.}26,\frac{2}{9},-\mathrm{.}95,-1\mathrm{.}10,\frac{10}{2},46,\mathrm{.}71],[\frac{7}{16},\mathrm{.}61,91,\frac{2}{10},\mathrm{.}46,16,\frac{10}{3},1\mathrm{.}16,1\mathrm{.}16],[\frac{7}{17},-\mathrm{.}61,-\mathrm{.}31,2/11,\mathrm{.}66,2\mathrm{.}15,\frac{10}{6},16,-1\mathrm{.}63],[\frac{7}{18},-2\mathrm{.}15,1\mathrm{.}05,\frac{2}{12},-\mathrm{.}36,-\mathrm{.}05,\frac{10}{7},-2\mathrm{.}26,-\mathrm{.}46],[\frac{7}{19},-\mathrm{.}90,-\mathrm{.}60,\frac{2}{15},1\mathrm{.}16,2\mathrm{.}01,\frac{10}{8},\mathrm{.}56,\mathrm{.}56],[\frac{7}{20},-\mathrm{.}95,-1\mathrm{.}15,\frac{2}{16},\mathrm{.}56,\mathrm{.}56,\frac{10}{9},-\mathrm{.}36,-\mathrm{.}16],[\frac{7}{23},.76,\mathrm{.}45,\frac{2}{17},-\mathrm{.}36,-\mathrm{.}16,\frac{10}{10},\mathrm{.}36,-\mathrm{.}06],[\frac{7}{24},\mathrm{.}26,\mathrm{.}07,\frac{2}{18},\mathrm{.}36,15,\frac{10}{13},\mathrm{.}00,-\mathrm{.}16]]$

iven the above information, calculate the cumulative abnormal return $($CAR$)$ for these tocks as a group. All of the stocks have a beta of $1$ and no other announcements are nade. $($ A negative answer should be indicated by a minus sign. Leave no cells blank e certain to enter $"0"$ wherever required. Do not round intermediate calculations and ound your answers to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

$\backslash$table$[[\backslash$table$[[$Days from$],[$announcement$]],$Abnormal returns $(R_{\text{I}}-R_M),\backslash$table$[[$Average abnormal$],[$return$]],\backslash$table$[[$Cumulative$],[$abnormal return$]]],[$Delta$,$United,American,Sum$],[-4],[-3],[-2],[-1],[0],[1],[2],[3],[4,,,,,5,]]$

Fill out the whole table please.