[Tex/LaTex] How to format answer in answer package

Question

I use answers package. In out put of answer, I want to format 1) or Answer 1. instead of 1 as default. How can I do it? My code is

\documentclass[12pt,a4paper]{article}
\usepackage{amsthm}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{fourier}
\usepackage[left=2cm,right=2cm,top=2cm,bottom=2cm]{geometry}
\theoremstyle{definition}
\newtheorem{ex}{Exercise}
\usepackage{answers}
\Newassociation{sol}{Solution}{ans}
\begin{document}
\Opensolutionfile{ans}[ans1]
\begin{ex}
This is a question.
\begin{sol}
This is an answer.
\end{sol}
\end{ex}
\Closesolutionfile{ans}
\section{Ansewr}
 \input{ans1}
\end{document}

Answer 1

Once you declare

\Newassociation{sol}{Solution}{ans}

you can use

\renewcommand{\Solutionlabel}[1]{\emph{Solution #1}}

Instead of \emph{Solution #1} do whatever formatting you need.

\documentclass[12pt,a4paper]{article}
\usepackage{amsthm}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{fourier}
\usepackage[left=2cm,right=2cm,top=2cm,bottom=2cm]{geometry}
\theoremstyle{definition}
\newtheorem{ex}{Exercise}
\usepackage{answers}
\Newassociation{sol}{Solution}{ans}
\renewcommand{\Solutionlabel}[1]{\textbf{Answer #1.}}
\begin{document}
\Opensolutionfile{ans}[ans1]
\begin{ex}
This is a question.
\begin{sol}
This is an answer.
\end{sol}
\end{ex}
\Closesolutionfile{ans}
\section{Answer}
 \input{ans1}
\end{document}