Answers should be a phrase, a line of code, or possibly one or more full sentences.

$(1)$ In R$,$ we can use the $"$up arrow" on our keyboard to do what? $(2$ points$)$

$(2)$ What does the length$()$ function do$?(2$ points$)$

$(3)$ You want to create a vector called "ages" that has the following $7$ values: $4,15,29,33,47,69,92.$ Write the line of code that would create this vector. $(2$ points$)$

$(4)$ What do the following symbols mean? For each symbol, define what the symbol means $AN{I}_{?}$ write a line of code that will output a "TRUE". $(6$ points$)$

$($a$)$ double equal sign