Problem 1:

Make a code by performing following steps

1. Define a radius r with r = 2
2. Define a row vector x whose first element is -4, and the increment size is 0.05 and last element is 3. So, the first element will be -4, second element will be -3.9500 so on and so forth.
3. Make a for loop that calculates and saves it in a variable with name , using array indexing i and then calculates and saves it in another variable with name using the array indexing i.
4. Make a plot with values of on x-axis and values of on y-axis

Note: You will use only one for loop

Note: There is multiplication happening between r and that is and multiplication happening between r and that is .