Undergraduate Websites, web programming

Assign css code for my web page

can use any software ,html code is alredy there ,must do css in seperate css file named homework.css, all images are there ,personal message for more detailes its easy work,

file is here:-https://drive.google.com/open?id=1ySJ0qHG-oO_U0hJC5hwNfc-oM5prLZRn