Using the figure from problem $4$ again, modify this figure $3$ times. For each modification, make $$ drowing showing the new mechanism with your modification and use the Kutzbach criterion to demonstrate that your modification satisfies the requiremer

$7.$ Modify $1$ joint to make this system have mobility $=2(\text{'}$modify$\text{'}$ a joint means to change it to a different type of jaint$)$

$8.$ Modify $1$ joint to moke this system have mobility $=0$

$9.$ Modify however you choose to make this system have mobility $=-1$

Try to do this with as few modifications as possible, though you dan't need to achieve this with the absolute minimum number of changes to achieve moximum score,