a$)$ Describe how basic microeconomic tools such as indifference curves and budget constraints can contribute to an understanding of how individuals choose how much labour to supply to the $($paid$)$ labour market. $[50$ marks$]$

$($b$)$ Discuss some of the difficulties that might be encountered in trying to apply these tools to the labour supply issues and decisions that confront individuals and households$/$families$.$ Briefly comment on how some of these difficulties might be addressed. $[50$ marks$]$