write a program in c using enum user defined data type to calculate and print the electricity bill of a given customer. the customer id$,$ name, and unit consumed by the yser shpuld be captured from the keyboard to display the total amount to be paid to the customer.

unit upto $199$ charge$/$unit is $1\mathrm{.}20$

unit $200$ and avobe but less than $400$ charge$/$unit $1\mathrm{.}50$

unit $400$ and above but less than $600$ charge$/$unit $1\mathrm{.}80$

unit$600$ and above charge $/$unit $2\mathrm{.}00$

if bill exceeds rs $400$ then a surcharge of $15$ will be charged and fhe minimum bill ehould be of rs $100$