https://www.google.com/search?client=safari&rls=en&q=A+solid+cylindrical+conducting+shell+of+inner+radius+a+=+4.2+cm+and+outer+radius+b+=+6+cm+has+its+axis+aligned+with+the+z-axis+as+shown.+It+carries+a+uniformly+distributed+current+I2+=+5.7+A+in+the+positive+z-direction.+An+inifinte+conducting+wire+is+located+along+the+z-axis+and+carries+a+current+I1+=+3.1+A+in+the+negative+z-direction.&ie=UTF-8&oe=UTF-8