Assertion (A): Python lists allow modifying their elements by indexes easily.

Reason (R): Python lists are mutable.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Convert the following binary numbers into decimal:

(a) 10010

(b) 101010

Observe the code given below and answer the following questions:

n = ............... #Statement 1
if ............... : 
#Statement 2
    print ("Please enter a positive number")
elif ............... : 
#Statement 3
    print ("You have entered 0")
else:
    ...............
#Statement 4

(a) Write the input statement to accept n number of terms — Statement 1.

(b) Write if condition to check whether the input is a positive number or not — Statement 2.

(c) Write if condition to check whether the input is 0 or not — Statement 3.

(d) Complete Statement 4.

Explain the membership operators in String.