list as an answer in a jme gapfill

gistfile1.txt

{	notes: ""
	name: MAS3214 20122013 CBA1_4
	percentPass: 50
	shuffleQuestions: false
	rulesets:{
			std:[all,fractionNumbers, !collectNumbers,!noLeadingMinus]
			}
			
	navigation: {
		allowregen: true
		showfrontpage: false
		reverse: true
		browse: true
	}

	feedback: {
		showtotalmark: true
	}

	questions: [
				{
			name: MAS3214 20122013 CBA1_4

			variables: {
				n: "p*q"
				p: "random(5,7,11)"
				q: "switch(p=7,random(2,3,5),random(2,3))"
				a: "random(2..n-1)"
				m: "random(1..3)"
				b: "if(a+p-m*q>=0,mod(a+p-m*q,n),n+mod(a+p-m*q,n))"
				a1: "mod(a+p,n)"
				b1: "if(a-m*q>=0,mod(a-m*q,n),n+mod(a-m*q,n))"
				c: "mod(a+b,n)"
				d: "mod(a*b,n)"
				ans: "sort([b,a1,b1])"
				
							}

			parts: [
				{
					type: gapfill

					prompt: """
					Show that $x=\var{a}$ is a solution of the quadratic equation in $\mathbb{Z}_{\var{n}}$ :
					
					\[\simplify[std]{x^2 -{c}x+{d} = 0}\]
					
					There are four solutions in  $\mathbb{Z}_{\var{n}}$ of this quadratic equation.
					
					
					
					Enter the other 3 roots apart from $x=\var{a}$ in a list below as elements in $\mathbb{Z}_{\var{n}}$ i.e. in the form $[a,b,c]$ with $0\le a \lt b \lt c \le \var{n-1}$ 
					
					Other three roots are: [[0]]
					"""

					gaps: [
						{type: jme, answer: "{ans}", marks: 4}
						]
				}
				
			]

			advice: """
				
			"""
		}

	]
			
			
}