$3.(30$ points$)$ Deadlocks

Consider the following snapshot of a system:

$(1)(5$ points$)$ What is the content of the Need matrix?

$(2)(10$ points$)$ Is the system in a safe state? Why?

$(3)(5$ points$)$ If a request from process P$1$ arrives for $\backslash ((1,1,0,2)\backslash ),$ can the request be granted? Why?

$(4)(10$ points$)$ If a request from process P$0$ arrives for $\backslash ((1,1,2,1)\backslash ),$ can the request be granted? Why?