<p>hello , i need help in this lisp program</p><p>Write a Lisp program that calculates the distance between twoarbitrary points P1:(x1 y1) and</p><p>P2:(x2 y2) based on the following formula.</p><p>( P1, P2)=
<p dir="ltr"><img src="https://d2vlcm61l7u1fs.cloudfront.net/media%2Feae%2Feae00158-c42a-4033-9b86-3f4ad453cd36%2Fimage" alt="2. In an array based representation of a binary tree, what should be the maximum size of the array to accommodate the binary tree shown below? 21