Look down to lab $2$; use the DOS$/$Terminal to implement the following: $(3\mathrm{.}5$ points$)$

Write a command to show the MD$5$ value before and after file modification. $(1$ point$)$

Write a command to encrypt and decrypt any file with symmetric encryption using one of the ready cipher texts. $(1$ point$)$

Write a command to encrypt and decrypt any file with Asymmetric encryption. $($generate private and public keys $-$ then encrypt and decrypt$)-$ No need to share your public key with the destination $(1\mathrm{.}5$ points$)$