Auser is surfing the internet using a laptop from a public wifi care. what should be checked first when the user connects to the public network?

He should check that he is only visiting websites that have HTTPS protocol.  This is so if someone intercepts the traffic, they will not be able to decipher it, since it is encrypted with RSA keys.  He should also check the validity of the network (making sure it's a legitamate network that is owned by legitimate business.)

He should also consider using a VPN.

VPN

Explanation:

yes we can change both the color of the value of a cell as well as background color of a cell at the same time .

as we know that excel sheet consists of columns and rows.

and intersection of column and row is called cell.

we can change color of the cell and background of the cell at the same time.

hence the statement that

can a person change color of the cell and background of the cell at the same time is true.

1. a

2. a

3. d

explanation: