Refer to the exhibit. A network technician is unable to ping from R1 to R2. What will help correct the problem?

Question:
Refer to the exhibit. A network technician is unable to ping from R1 to R2. What will help correct the problem?

• Ensure that the serial cable is correctly plugged in to the interfaces.
• Apply the clock rate 56000 configuration command to the serial0/1 interface of R1.
• Configure the serial0/1 interfaces on R1 and R2 with the no shutdown command.
• Change the address of the serial0/1 interface of R1 to 192.1.1.4.
• Change the subnet masks of both interfaces to 255.255.255.240.

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