Question textAnswer the following questions by filling in the blanks. Don't use any spaces Give answers as fractions using the forward slash (e.g. 1/2 or 3/4) if the answer is not an integer. Do NOT use brackets unless specified. Use - for any negatives. This question is worth ( 4+8 ) = 12 marks a. For the following arithmetic sequence: 50, 43, 36, 29,…i. The first term [math: a] is :  Answer 1 Question 6[input]ii. The common difference [math: d] is :  Answer 2 Question 6[input]iii. [math: t32] = Answer 3 Question 6[input]iv. The sum of the first 21 terms is : Answer 4 Question 6[input] b. The 16th term and the 20th term of a different arithmetic sequence are 143 and 195 respectively.The two simultaneous equations that can be formed are:Equation 1: a + Answer 5 Question 6[input] d = 143 and Equation 2: Answer 6 Question 6[input] a + 19 d = Answer 7 Question 6[input] Their solutions are:a = Answer 8 Question 6[input] and d = Answer 9 Question 6[input]Hence, the first three terms are: Answer 10 Question 6[input], Answer 11 Question 6[input] and Answer 12 Question 6[input] Please answer all parts of the question.多项填空题