Question $20($Advanced problem$)$ It is required to write a function to check if a robot have been instructed to move in a loop $($starts and stops at the same location$).$ The robot is positioned on a grid, in the location $(0,0)$ and facing North. The robot can receive a sequence of instructions, where: F: move forward L: rotate $90$deg on the spot R: rotate $-90$deg on the spot For example: FFLLFF$,$ in this sequence the robot moves from $(0,0)$ to $(0,1),$ then $(0,2),$ turns $180$ degrees, and then returns to $(0,1)$ then $(0,0).$ Write a function that accept a string that represent sequence of moves $($path$)$ and return True if this sequence represent a loop, False otherwise. The function has the following definition: def is$\_$loop $($path$)$: BE IT IT IT Input: path as string represent the robot moves Output: True if path is a loop, False otherwise Examples: $>>>$ is$\_$loop $(\text{'}$FFLLFF$\text{'})$ True $>>>$ is loop $(\text{'}$FFRFRFFRF$\text{'})$ True $>>>$ is$\_$loop $(\text{'}$FRFF$\text{'})$ False $>>>$ is$\_$loop $("\text{'})$ True $>>>$ is$\_$loop $(\text{'}$F$\text{'})$ False $>>>$ is$\_$loop $(\text{'}$L$\text{'})$ True