Consider that the following variables have been declared: int David_Tennant; double Matt_Smith; Which of the following statements are valid. Select all that apply.

a. Integer tenth = David_Tennant;
b. (double)David_Tennant = Matt_Smith;
c. Matt_Smith = double(David_Tennant;)
d. Matt_Smith = (double)David_Tennant;
e. Matt_Smith = David_Tennant;

Double eleventh = 11.50;
David_Tennant = eleventh. intValue();