Questions

Designers have to either combine marketing intelligence and artistic vision themselves, or be able to delegate business duties to hired specialists, agents, etc. while they focus on the art.

Since they can do 19 programs in 19 hours, Then 52 programs in 52 hours respectively.
And a 15 min interval
Total time they take to do 52 programs is 52 hours 15 minutes.

Adventure tourism : to convert the adventure into pleasure for the purpose of tourism business

Attraction : Anything/object/activity, which attracts tourists and attach with it.

Amenities : Extra facilities, service added with attraction, accessibility and accommodation to create tourism. It includes trust, friendship, hospitality, etc.

Back of the house : Staffs who are not directly involved in providing service. Guests rarely interact with them

Terylene and nylon are synthetic fibres produced by a process of polymerisation. Terylene is a polyester and nylon, a poyamide.

Silk is purely a natural product obtained from silk worms.

Rayon is a man-made material which consists of purified cellulose in the form of long fibres. Cellulose occurs in the cell wall of plants. Rayon fibre is chemically identical to cotton but has a shine like silk. Since it is  basically derived from a natural source (cellulose) it is called a regenerated fibre.