Define what is externality? Explain the positive and negativeexternalities caused by pandemic with examples..

(The following will be graded: 1.Design of assignment(yourname,id,subject,fonts,size,cover page) 2.Content must be relatedwith the topic.Please do not add irrelevant information3.References must be added properly 4.Please take note thatsimilarity report will be taken by the system so it is important touse your own words.Please do not copy-paste. 2 pages minimum 3pages maximum apart from cover page and references page.)