$[20]$

The current state of IIT Jammu is given as $($:$2C,2H,0R,3L$:$)$ where $C,H,R,$ and L represents Classroom, Hostel, Residence

and Laboratory entities respectively. Using an informed search approach, find the fastest and economic solution to achieve

the goal state At any stage, you are allowed to schedule exactly two activities. An activity is termed

as the construction of an entity. The cost of constructing each entity is given in the following Table $1.$