Write a program in C using the 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 user should be captured from the keyboard to display the total amount to be paid to the customer.

The charge are as follows:

Unit

Upto $199$

Charge $/$ Unit

$200$ and above but less than $400$

$($ie $1\mathrm{.}20$

$400$ and above but less than $600$

$($a$)1\mathrm{.}50$

$600$ and above

$($a$)1\mathrm{.}80$

$($a$)2\mathrm{.}00$

If bill exceeds Rs$,400$ then a surcharge of $15\%$ will be charged and the minimum bill should be of Rs$.100-$

$(5$M$)$