Let the following string variables exist:

x: string of Integer, where x $=<33,-5,10,25,-14>$

y: string of Integer, where y $=<0,7>$

r: string of Text, where r $=<$"Marie","Jason","Nicky","Conklin"$>$

s: string of Text, where s $=<$"rojo","verde"$>$

t: string of Text, where t $=<>$

Answer the following:

$1.$ x $*$ y $=$

$2.$ y $*$ x $=$

$3.|$r$|=$

$4.|$t$|=$

$5.$ x$[1,4)=$

$6.$ s $*$ t $=$

$7.$ t $*$ s $=$

$8.$ Let b $=$ "azul" $($b is a variable of type Text$)$

s $*=$

$9.$ rev$($r$)=$

$10.$ rev$($t$)=$

$11.$ Let z $=<$"Jason","Marie"$>$ then

z is prefix of r $=$

$12.$ Let w $=<33,-5,10>$ then

w is prefix of x $=$

$13.$ x$[0,1)=$

$14.$ x$[|$x$|-1,|$x$|)=$

$15.$ perms$($r$,$ rev$($r$))=$

$16.$ perms$($x$,<-5,33,10,52,-41>)=$

$17.$ r$[3,4)*$ s$[0,1)=$

$18.$ s$[0,1)*$ r$[1,2)*$ s$[1,2)=$

$19.$ The data type in the string variable x is:

$20.$ The data type in the string variable t is: