Refer to Table $12\mathrm{.}1$ and look at the period from $1973$ through $1980.$

a$.$ Calculate the average return for Treasury bills and the average annual inflation rate for this period. $($Do not round intermediate calculations and enter your answers as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

b$.$ Calculate the standard deviation of Treasury bill returns and inflation over this period. $($Do not round intermediate calculations and enter your answers as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

c$.$ What was the average real return for Treasury bills over this period? $($A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter your answer as a percent round

$\backslash$table$[[1945,36\mathrm{.}44,10\mathrm{.}73,\mathrm{.}33,2\mathrm{.}25],[1946,-8\mathrm{.}07,-10,35,18\mathrm{.}16],[1947,5\mathrm{.}71,-2\mathrm{.}62,\mathrm{.}50,9\mathrm{.}01],[1948,5\mathrm{.}50,3\mathrm{.}40,81,2\mathrm{.}71],[1949,18\mathrm{.}79,6\mathrm{.}45,1\mathrm{.}10,-1\mathrm{.}80],[1950,31\mathrm{.}71,06,1\mathrm{.}20,5\mathrm{.}79],[1951,24\mathrm{.}02,-3\mathrm{.}93,1\mathrm{.}49,5\mathrm{.}87],[1952,18\mathrm{.}37,1\mathrm{.}16,1\mathrm{.}66,\mathrm{.}88],[1953,-99,3\mathrm{.}64,1\mathrm{.}82,62],[1954,52\mathrm{.}62,7\mathrm{.}19,86,-\mathrm{.}50],[1955,31\mathrm{.}56,-1\mathrm{.}29,1\mathrm{.}57,\mathrm{.}37],[1956,6\mathrm{.}56,-5\mathrm{.}59,2\mathrm{.}46,2\mathrm{.}86],[1957,-10\mathrm{.}78,7\mathrm{.}46,3\mathrm{.}14,3\mathrm{.}02],[1958,43\mathrm{.}36,-6\mathrm{.}09,1\mathrm{.}54,1\mathrm{.}76],[1959,11\mathrm{.}96,-2\mathrm{.}26,2\mathrm{.}95,1\mathrm{.}50],[1960,47,13\mathrm{.}78,2\mathrm{.}66,1\mathrm{.}48],[1961,26\mathrm{.}89,97,2\mathrm{.}13,67],[1962,-8\mathrm{.}73,6\mathrm{.}89,2\mathrm{.}73,1\mathrm{.}22],[1963,22\mathrm{.}80,1\mathrm{.}21,3\mathrm{.}12,1\mathrm{.}65],[1964,16\mathrm{.}48,3\mathrm{.}51,3\mathrm{.}54,1\mathrm{.}19],[1965,12\mathrm{.}45,\mathrm{.}71,3\mathrm{.}93,1\mathrm{.}92],[1966,-10\mathrm{.}06,3\mathrm{.}65,4\mathrm{.}76,3\mathrm{.}35],[1967,23\mathrm{.}98,(\frac{18}{-9}),4\mathrm{.}21,3\mathrm{.}04],[1968,11\mathrm{.}06,-26,5\mathrm{.}21,4\mathrm{.}72],[1969,-8\mathrm{.}50,-5\mathrm{.}07,6\mathrm{.}58,6\mathrm{.}11],[1970,3\mathrm{.}86,12\mathrm{.}11,6\mathrm{.}52,5\mathrm{.}49],[1971,14\mathrm{.}30,13\mathrm{.}23,4\mathrm{.}39,3\mathrm{.}36],[1972,19\mathrm{.}00,5\mathrm{.}69,3\mathrm{.}84,3,41],[1973,-14\mathrm{.}69,-1\mathrm{.}11,6\mathrm{.}93,8\mathrm{.}80],[1974,-26\mathrm{.}47,4\mathrm{.}35,8\mathrm{.}00,12\mathrm{.}20],[1975,37\mathrm{.}23,9\mathrm{.}20,5\mathrm{.}80,7\mathrm{.}01],[1976,23\mathrm{.}93,16\mathrm{.}75,5\mathrm{.}08,4\mathrm{.}81],[1977,-7\mathrm{.}16,-69,5\mathrm{.}12,6\mathrm{.}77],[1978,6\mathrm{.}57,-1\mathrm{.}18,7\mathrm{.}18,9\mathrm{.}03],[1979,18\mathrm{.}61,-1\mathrm{.}23,10,38,13\mathrm{.}31]]$

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$42$

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$\backslash$table$[[(1$ii$),,$G$,\backslash$table$[[134],[$His$]],\frac{18}{181},],[,,,\frac{3\mathrm{.}55}{3\mathrm{.}5},,],[+,$w$.".,,-$s$.$t$.,0\mathrm{.}21,1...],[m,,,,5\mathrm{.}21,],[,,,,,$L$.$N$1],[$ling$,,,,,],[,,,-1\mathrm{.}14,...,,..],[,,,,1,\frac{12\mathrm{.}2}{12\mathrm{.}2}$ed to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$