[Tex/LaTex] How to change the line spacing on a longtable using multicolumn

Question

I want my document to be doublespaced but the cells in my longtable I need them to be singlespaced. I don't know how to do this in this enviroment.
All the examples I have seen so far are not using longtable neither multicolumn. Any help is appreciated.

\documentclass[12pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage[portuguese]{babel}
\usepackage[T1]{fontenc}
\usepackage[showframe=false,,left=2cm,right=2cm,top=2cm,bottom=4.5cm]{geometry}
\usepackage{makecell,multirow,tabularx,booktabs}
\usepackage{graphicx}
\usepackage{longtable}
\usepackage{lipsum}
\usepackage{setspace} 
\doublespacing

\begin{document}


\lipsum[1]


%%%%%%%%%%%%%%%%%%START TABLE%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{longtable}{|p{2.5cm}p{2.5cm}p{2.5cm}p{2.5cm}p{2.5cm}p{2.5cm}|}

    \endfirsthead

    \multicolumn{6}{r}{\makebox[17cm][r]{\textit{Continuação da página anterior}}}\\ \hline
    \endhead

    \hline
    \multicolumn{6}{r}{\makebox[17cm][r]{\textit{Continua na próxima página}}}\\
    \endfoot
    \endlastfoot

    \hline
    \multicolumn{6}{|l|}{\textbf{Atividade:}} \\
    \multicolumn{6}{|l|}{\parbox{17cm}{Verificar o \textit{deployment} dos ISEs e validar suas funções.}} \\
    \hline
    \multicolumn{6}{|l|}{\textbf{Tempo:}} \\
    \multicolumn{6}{|l|}{5 minutos} \\
    \hline
    \multicolumn{6}{|l|}{\textbf{Comando:}} \\
    \multicolumn{6}{|l|}{\parbox{15cm}{N/A}} \\
    \hline
    \multicolumn{6}{|l|}{\textbf{Resultado Esperado:}} \\
    \multicolumn{6}{|l|}{\parbox{15cm}{\lipsum[1]}} \\ %need to be singlespace
    \multicolumn{6}{|l|}{} \\
    \hline
\end{longtable}


\end{document}

Answer 1

Enclose longtablein

\begin{singlespace}

... your long table ...

\end{singlespace}