Write a c program that generates a "random walk" across a $10$ x $10$ array. The array will contain characters $($all $\text{'}.\text{'}$ initially$).$ The program must randomly "walk" from element to element, always going up$,$ down, left or right by one element. The elements visited by the program will be labeled with the letters A through Z$,$ in the order visited. Use the srand and rand functions $($see deal.c$)$ to generate random numbers. After generating a number, look at its remainder when divided by $4.$ There are four possible values for the remainder $--0,1,2$ and $3--$ indiciating the direction of the next move. Before performing a move, check that $($a$)$ it won't go outside the array, and $($b$)$ it doesn't take us to an element that already has a letter assigned. If either condition is violated, try moving in another direction. If all four directions are blocked, thr program must terminate. After $\text{'}$Z$\text{'},$ the letters should start over again at $\text{'}$A$\text{'}.$