can someone help me with these please

QUESTION 11 The following is a fundamental data type: unsigned True False QUESTION 12 The following is a fundamental data type: unsigned double True False QUESTION 13 Assume the following int a = 5, b=3 float x = 9.0, y = 2.11 z = 3.0 Evaluate the following expression (int)(y * 10 + b) QUESTION 14 Assume the following int a = 5, b=3 float x = 90, y = 2.11 z = 3.0, Evaluate the following expression: a +3* bla QUESTION 15 The following is a fundamental data type: long double True False QUESTION 16 F_45_34 is a valid identifier in C True False QUESTION 17 12xx3 is a valid identifier in C True False QUESTION 18 The following is a fundamental data type long char True False QUESTION 19 Indicate the value of the identifier C in the same format that the identifier was declared once the following kne of code has completed. char c = 'h'.5; QUESTION 20 _x@_b23 is a valid identifier in True False QUESTION 21 The following is a fundamental data type: char True False