How can I write an script to create the circle function in this question in matlab

Assignment 1. Write a Matlab script called yourlastname 8 1.m which creates and plots an 2-D arra that represent a two dimensional shape as described below. Using the lecture exar box_demo_1.m (available on the Sakai lecture site -Week 10 Lesson) as a guide, must include A "main" function which clears the command window (clc), clears all workspa (clear all) and closes all open figure windows (close all); declares the Ny, d and color to be global; defines a 50 x 50 design space by setting Nx-50 initializes Ny Nx arrays d and color to false and char (0), respectively Commands to create the following shapes -a red circle of radius, R=15, centered at x=y=25 a green box with 17