A Python program starts as follows:

length $=\text{'}6\mathrm{.}5\text{'}$

width $=\text{'}4\mathrm{.}5\text{'}$

This code is followed by a Python statement that defines variable Perimeter in different ways in the four cases below. What is the value of the variable Perimeter in each case after that statement? If the statement execution will cause an error, then pick that option.